Securities Class Actions: A Comprehensive Guide for Shareholders and Investors

A securities class action is a lawsuit brought on behalf of investors who allegedly suffered losses because of violations of the federal securities laws.

For public-company investors, these cases most commonly arise when a company or its executives allegedly made materially false or misleading statements about the company's business, financial condition, operations, products, regulatory compliance, prospects, or other matters important to investors.

Another important category concerns allegedly false or misleading statements in a registration statement or prospectus used in connection with an IPO, follow-on offering, direct listing, or other registered securities offering.

Rather than requiring potentially thousands of investors to bring separate lawsuits concerning the same alleged misconduct, the class-action procedure allows one or more investors to pursue claims on behalf of a defined group of similarly situated investors.

Federal Rule of Civil Procedure 23 provides the framework for federal class actions. Among other requirements, the proposed class must satisfy numerosity, commonality, typicality, and adequacy, and a damages class under Rule 23(b)(3) must establish that common questions predominate and that class treatment is superior to other methods of adjudication.

Public-company investors rely heavily on information supplied by issuers and their executives.

Investors may make decisions based on:

• Forms 10-K and 10-Q;
• earnings releases;
• earnings calls;
• investor presentations;
• SEC filings;
• financial statements;
• revenue and earnings guidance;
• statements about customer demand;
• product development;
• FDA or other regulatory developments;
• clinical-trial results;
• order backlog;
• business pipelines;
• cybersecurity;
• internal controls;
• acquisitions;
• compliance matters; and
• other information concerning the company's business.

Federal securities laws provide remedies when material misinformation allegedly affects investment decisions and causes investor losses.

Securities class actions allow investors with similar claims to seek recovery collectively.

A sharp stock decline does not by itself establish a securities-law violation.

But significant corporate developments can prompt shareholders and counsel to investigate whether investors previously received materially inaccurate or incomplete information.

Examples include:

Accounting Problems

Potential issues may involve:

• accounting restatements;
• revenue-recognition problems;
• improperly capitalized expenses;
• reserve deficiencies;
• financial-reporting errors;
• auditor resignations;
• delayed SEC filings; or
• material weaknesses in internal controls.

Unexpected Business Deterioration

Litigation may investigate whether management previously misrepresented or concealed:

• declining customer demand;
• order cancellations;
• customer losses;
• excess inventory;
• deteriorating margins;
• pricing pressure;
• channel inventory;
• slowing bookings;
• reduced backlog;
• production problems; or
• competitive pressures.

Regulatory Problems

Potential cases can arise after:

• SEC investigations;
• DOJ investigations;
• FDA actions;
• government subpoenas;
• regulatory enforcement;
• product recalls;
• compliance violations; or
• other significant government action.

Pharmaceutical and Biotechnology Developments

Investor claims may involve statements concerning:

• clinical trials;
• efficacy;
• safety;
• adverse events;
• FDA communications;
• regulatory submissions;
• enrollment;
• clinical endpoints; or
• the likelihood and timing of regulatory approval.

Technology and Cybersecurity

Cases may involve alleged misstatements concerning:

• cybersecurity breaches;
• vulnerabilities;
• data privacy;
• customer retention;
• artificial-intelligence products;
• product capabilities;
• demand;
• subscription growth; or
• key technology risks.

Short-Seller Reports

A report from a short seller may cause a significant stock decline and prompt an investigation into statements previously made by the company.

A short-seller report does not itself establish that securities fraud occurred. But allegations in such a report, together with company disclosures, SEC filings, subsequent admissions, regulatory developments, or other evidence, can become part of a securities investigation.

For public investors, it is useful to distinguish two major federal securities-law frameworks:

Section 10(b) of the Securities Exchange Act of 1934 and SEC Rule 10b-5

These claims generally concern materially false or misleading statements or deceptive conduct affecting investors who purchased or sold securities in the market.

Section 11 of the Securities Act of 1933

These claims concern materially false or misleading registration statements used to register securities for a public offering or other registered distribution.

These laws overlap in their goal of protecting investors, but they have important differences concerning the statements covered, state of mind, standing, defendants, damages, and procedural requirements. Section 10(b) appears in the Exchange Act, while Section 11 expressly creates liability for specified defects in a registration statement.

Section 10(b) of the Securities Exchange Act prohibits manipulative or deceptive devices in connection with the purchase or sale of securities. SEC Rule 10b-5 implements that prohibition and, among other things, prohibits materially false statements and misleading half-truths in connection with securities transactions.

Private Section 10(b)/Rule 10b-5 claims typically involve allegations that a public company and one or more executives misrepresented or concealed material facts and that investors suffered economic losses when the truth emerged.

The Supreme Court has described the principal elements of a private Rule 10b-5 securities-fraud claim as including:

1. 1.a material misrepresentation or omission;
2. 2.scienter;
3. 3.a connection with the purchase or sale of a security;
4. 4.reliance;
5. 5.economic loss; and
6. 6.loss causation.

A statement is not actionable merely because it later proves incorrect.

The relevant question includes whether a statement concerning a material fact was materially false or misleading when made.

Materiality generally asks whether the information would have been important to a reasonable investor in evaluating the security.

Examples may include statements concerning:

• revenues;
• earnings;
• customer demand;
• major contracts;
• business pipelines;
• product safety;
• clinical trials;
• regulatory compliance;
• government investigations;
• manufacturing capacity;
• material customers;
• accounting;
• internal controls;
• liquidity;
• acquisitions;
• financial guidance; or
• other matters important to the company's valuation or prospects.

Companies do not necessarily have to disclose every fact known internally.

But when a company chooses to speak, the securities laws can prohibit it from omitting material information necessary to prevent what it actually said from being misleading.

Rule 10b-5(b) expressly addresses omissions necessary to make statements already made not misleading.

This distinction is important because securities litigation often concerns not a statement that was literally false in every respect, but a statement that allegedly presented investors with a materially incomplete picture.

Scienter concerns the defendant's state of mind.

Section 10(b) securities-fraud litigation generally requires more than showing that a statement was inaccurate.

The PSLRA requires a complaint, for each alleged securities-fraud violation requiring proof of a particular state of mind, to allege particular facts giving rise to a strong inference that the defendant acted with the required state of mind. The Supreme Court's Tellabs decision addresses how courts evaluate that statutory strong-inference requirement.

Depending on the applicable jurisdiction and facts, evidence relevant to scienter may include:

• internal reports contradicting public statements;
• contemporaneous knowledge by senior executives;
• repeated internal warnings;
• unusual insider stock sales;
• communications with regulators;
• admissions after the alleged class period;
• management involvement in the underlying issue;
• the importance of the issue to the company's core business; or
• other facts suggesting that the alleged misstatement was not simply an innocent mistake.

Securities cases frequently involve an event that allegedly reveals previously concealed information to the market.

This is often referred to as a corrective disclosure.

Examples can include:

• an earnings announcement;
• reduced guidance;
• an accounting restatement;
• disclosure of a government investigation;
• disclosure of customer losses;
• a product recall;
• clinical-trial data;
• an FDA announcement;
• an executive departure;
• a short-seller report followed by confirming information;
• an auditor resignation; or
• another event revealing information related to the alleged fraud.

The disclosure does not necessarily have to use the words “our prior statement was false.” The key issue is whether information related to the alleged misrepresentation reached the market and caused a compensable investor loss.

An investor must establish a connection between the alleged securities violation and the economic loss for which recovery is sought.

This concept is known as loss causation.

In Dura Pharmaceuticals v. Broudo, the Supreme Court held that merely purchasing stock at an allegedly inflated price is not by itself sufficient to establish the required economic loss and causal connection.

This is why securities cases frequently analyze the company's stock-price reaction to one or more disclosures.

A securities complaint may allege that false or misleading information caused a security to trade at a price higher than it otherwise would have.

The difference attributable to the alleged misinformation is often described as artificial inflation.

A later disclosure can allegedly remove some or all of that inflation from the stock price.

This does not mean that every dollar of a stock-price decline is necessarily attributable to fraud. Other company-specific or market-wide information can affect the price at the same time.

Economists are therefore frequently involved in securities cases to analyze price impact, inflation, loss causation, and damages.

Not necessarily.

In many securities class actions involving securities traded in an efficient public market, plaintiffs may invoke the fraud-on-the-market doctrine recognized in Basic Inc. v. Levinson.

The theory allows reliance to be addressed on a classwide basis through a rebuttable presumption based on reliance on the integrity of a market price affected by public information. The Supreme Court has continued to recognize the Basic framework in later securities class-action decisions.

Accordingly, an investor does not necessarily need to prove that he or she personally read every challenged SEC filing, press release, or earnings-call transcript.

The class period is the period during which investors covered by the asserted claims allegedly purchased or otherwise acquired securities at prices affected by the alleged misconduct.

A securities complaint may, for example, define a putative class as investors who purchased a company's common stock between a particular beginning date and ending date and suffered damages.

The beginning of a class period often relates to the first allegedly actionable statement or the beginning of the alleged inflation period.

The end may relate to a corrective disclosure or the final alleged disclosure through which the relevant truth entered the market.

A class period can change as the litigation develops.

The class is the group of investors whose claims are being litigated collectively.

A hypothetical class definition might include: all persons and entities that purchased or otherwise acquired Company X common stock between specified dates and suffered damages as a result of the alleged federal securities-law violations.

The actual class definition is determined through the litigation and ultimately by the court. Under Rule 23, the court's certification order must define the class and the claims or issues being certified.

Before the court formally grants class certification, the proposed group is often called a putative class.

The complaint may be filed “on behalf of all persons similarly situated,” but the court later decides whether the requirements of Rule 23 are satisfied.

The court evaluates matters such as:

• whether there are enough class members;
• whether common issues exist;
• whether the representative's claims are typical;
• whether the representatives and counsel will adequately protect the class;
• whether common questions predominate; and
• whether class litigation is superior to individual cases.

The Private Securities Litigation Reform Act of 1995, commonly called the PSLRA, establishes important procedures and pleading requirements for private federal securities litigation.

Among other things, the PSLRA governs:

• lead-plaintiff appointment;
• lead-plaintiff notice;
• selection of lead counsel;
• heightened pleading of securities-fraud allegations;
• pleading of scienter;
• discovery stays during motions to dismiss;
• settlement notices;
• attorneys' fees; and
• certain forward-looking statements.

The relevant PSLRA provisions appear in both the Securities Act and Exchange Act.

One of the first important events is publication of a PSLRA notice.

Under the statute, no later than 20 days after the first complaint is filed, the plaintiff must cause notice to be published advising investors:

• that the action is pending;
• what claims are being asserted;
• what class period is alleged; and
• that members of the purported class have 60 days from publication of the notice to move the court for appointment as lead plaintiff.

This is the source of the “60-day lead plaintiff deadline” often seen in securities-law advertisements and press releases.

This point is frequently misunderstood.

The 60-day deadline is the deadline to ask the court to appoint you as lead plaintiff. It is not ordinarily a deadline requiring every class member to file something merely to remain part of the class.

A shareholder who does not seek appointment as lead plaintiff may still remain a passive member of the class if that investor falls within the class definition and satisfies the applicable requirements.

If there is eventually a settlement, class members may later receive notice and be required to submit a claim form by a separate deadline to receive a distribution. Those are different deadlines.

The PSLRA expressly permits any member of the purported class to seek lead-plaintiff appointment within 60 days of the published notice, including an investor who was not the person who filed the original complaint.

The judge — not the law firm that filed the first complaint — appoints the lead plaintiff.

The PSLRA creates a rebuttable presumption that the “most adequate plaintiff” is the person or group that:

1. 1.filed the complaint or made a timely lead-plaintiff motion;
2. 2.has the largest financial interest in the relief sought by the class; and
3. 3.otherwise satisfies the applicable requirements of Rule 23.

That presumption can be rebutted with proof that the presumptive plaintiff will not fairly and adequately protect the class or is subject to unique defenses that make the person incapable of adequately representing it.

Not automatically.

Financial interest is extremely important because the PSLRA creates a presumption favoring the qualifying movant with the largest financial interest.

But the court must also consider Rule 23 requirements, adequacy, typicality, and potential unique defenses.

Courts may also have to resolve competing calculations concerning trading losses and financial interest. The ultimate appointment is made by the court.

No.

This is another important feature of the PSLRA.

An investor can move for lead-plaintiff appointment in response to the PSLRA notice even if the investor was not named in the first complaint.

The statutory focus is not simply “who filed first.” It is on identifying the most adequate plaintiff under the PSLRA framework.

The PSLRA generally directs the court to consider the motions and appoint the most adequate plaintiff within 90 days after publication of the PSLRA notice.

If substantially similar actions are being consolidated, the court generally waits until the consolidation issue is resolved and then appoints lead plaintiff as soon as practicable.

The lead plaintiff is not simply a name placed on the complaint.

The lead plaintiff serves as an active representative of the proposed class and generally works with counsel to oversee the litigation.

Responsibilities can include:

• reviewing significant pleadings;
• communicating with lead counsel;
• discussing litigation strategy;
• reviewing developments in the case;
• producing relevant trading records;
• participating in discovery when required;
• potentially sitting for a deposition;
• evaluating settlement proposals;
• reviewing proposed settlement terms;
• overseeing counsel's prosecution of the litigation; and
• acting in the interests of the class as a whole.

The PSLRA requires a representative plaintiff to certify, among other things, that the plaintiff has reviewed the complaint, authorized its filing, is willing to serve as a representative, and is willing to provide testimony at deposition and trial if necessary.

Yes, subject to court approval.

The PSLRA provides that the most adequate plaintiff selects and retains counsel to represent the class, subject to the approval of the court.

This reflects one of the PSLRA's central concepts: the investor representative is supposed to supervise the lawyers rather than merely serve as a nominal plaintiff selected by lawyers.

This is one of the most important concepts for shareholders.

Lead Plaintiff

The lead plaintiff takes an active role in representing the class. The lead plaintiff may:

• supervise counsel;
• review major litigation decisions;
• communicate periodically with the lawyers;
• produce documents;
• provide testimony if necessary; and
• participate in evaluating settlement.

Passive Class Member

Most investors are passive class members. They generally:

• do not direct the litigation;
• do not attend routine court proceedings;
• do not participate in discovery simply because they are class members;
• do not have to make the 60-day lead-plaintiff motion;
• remain represented by class counsel if they are within a certified class and do not opt out; and
• may later submit a claim form if the litigation results in a settlement or judgment.

Rule 23 provides for notice to qualifying Rule 23(b)(3) class members and gives them the opportunity to request exclusion from the class. Those who remain in the class can be bound by the judgment.

Ordinarily, the lead plaintiff does not receive a larger per-share recovery merely because he or she served as lead plaintiff.

The PSLRA provides that the representative party's share of a final judgment or settlement generally must be calculated on the same per-share basis as the recovery of other class members.

The statute does, however, permit court-approved reimbursement of reasonable costs and expenses, including lost wages, directly related to representing the class.

The PSLRA includes a restriction aimed at professional plaintiffs.

Except as a court may otherwise permit consistent with the statute's purposes, a person generally may serve as lead plaintiff — or as an officer, director, or fiduciary of a lead plaintiff — in no more than five securities class actions during a three-year period.

It is common for several securities complaints concerning substantially the same alleged misconduct to be filed after a major stock decline.

The cases may then be consolidated.

The PSLRA specifically addresses this situation and generally postpones final lead-plaintiff selection until the court resolves a pending consolidation issue.

After appointment, the lead plaintiff and lead counsel commonly file a consolidated or amended complaint that becomes the operative pleading.

The litigation frequently proceeds through stages such as:

1. 1.appointment of lead plaintiff and lead counsel;
2. 2.filing of an amended or consolidated complaint;
3. 3.defendants' motion to dismiss;
4. 4.court decision on the motion to dismiss;
5. 5.discovery if claims proceed;
6. 6.class certification;
7. 7.expert discovery;
8. 8.summary judgment;
9. 9.settlement discussions or mediation;
10. 10.trial; and
11. 11.appeals, where applicable.

Not every case follows the same path.

Many cases resolve through settlement, while others are dismissed, proceed through discovery, or are litigated through trial and appeal.

The PSLRA imposes detailed pleading requirements on securities-fraud complaints.

For Exchange Act fraud allegations, the complaint generally must identify the challenged statements and explain why they were allegedly misleading. Where state of mind is required, the complaint must state particular facts creating the required strong inference of scienter.

The motion-to-dismiss stage therefore frequently involves detailed analysis of:

• company statements;
• SEC filings;
• confidential-witness allegations;
• executive knowledge;
• scienter;
• loss causation;
• materiality;
• forward-looking statements; and
• the overall factual context.

Generally not while a motion to dismiss is pending in a PSLRA-covered private securities case.

Both the Securities Act and Exchange Act PSLRA provisions generally stay discovery and other proceedings during the pendency of a motion to dismiss unless the court finds that particularized discovery is necessary to preserve evidence or prevent undue prejudice.

The statutes also impose obligations to preserve relevant evidence during the stay.

Statements about future performance can raise different issues from statements about existing or historical facts.

The PSLRA contains statutory safe-harbor provisions for certain forward-looking statements, subject to the statute's conditions and exceptions.

Potentially relevant statements can include:

• revenue forecasts;
• earnings projections;
• expected growth;
• future product launches;
• anticipated regulatory events;
• expected margins;
• projected demand; or
• management plans.

The fact that a statement concerns the future does not end the analysis. Its wording, accompanying cautionary language, factual components, speaker knowledge, and statutory exclusions can matter.

Section 11 of the Securities Act of 1933 creates a separate cause of action when a registration statement, when effective, contains a material untrue statement or omits a material fact required to be stated or necessary to make the registration statement not misleading.

Section 11 expressly permits a qualifying person who acquired the covered security to sue specified participants in the offering.

Section 11 is particularly important in litigation arising from:

• IPOs;
• follow-on offerings;
• secondary registered offerings;
• direct listings;
• certain stock-for-stock acquisitions; and
• other registered securities offerings.

The two claims protect investors in different ways.

Section 10(b)/Rule 10b-5

Generally concerns securities fraud in connection with market purchases or sales and requires proof of scienter, reliance, economic loss, and loss causation, among other elements.

Section 11

Focuses specifically on material defects in a registration statement.

A Section 11 plaintiff generally does not have to prove scienter in the manner required by Section 10(b). The statute creates express liability and provides defenses for certain defendants.

This makes it important for investors to identify whether their purchases relate to a particular registered offering.

A company offering securities to the public generally files a registration statement with the SEC unless an exemption applies.

The registration statement contains information concerning the issuer, the offering, financial information, risk factors, management, the securities offered, and other required disclosures.

A prospectus is generally part of the registration framework and is used to provide offering information to investors.

Potential claims can involve allegedly inaccurate or incomplete disclosure concerning:

• revenues;
• financial statements;
• business trends;
• material customers;
• regulatory issues;
• product safety;
• clinical developments;
• accounting;
• internal controls;
• acquisitions;
• material risks;
• management;
• operations; or
• other information required or materially necessary in the registration statement.

Section 11 expressly addresses both material misstatements and specified material omissions.

Section 11 identifies several categories of potential defendants, including:

• the issuer;
• persons who signed the registration statement;
• directors at the relevant time;
• persons named with their consent as directors or prospective directors;
• certain experts, such as accountants, with respect to material they prepared or certified; and
• underwriters.

The defenses and standards applicable to each category can differ.

Section 11 is not structured like a Section 10(b) fraud claim.

A qualifying plaintiff generally does not need to establish that the issuer intended to deceive investors merely to establish a Section 11 violation based on a materially defective registration statement.

Other defendants can have statutory defenses, including due-diligence defenses under circumstances set out in Section 11.

Section 11 applies to an investor who acquired the security covered by the allegedly defective registration statement.

In Slack Technologies, LLC v. Pirani, the Supreme Court held that a Section 11 plaintiff must plead and prove that the securities purchased are traceable to the particular registration statement alleged to be false or misleading.

Traceability can therefore be an important issue when registered and unregistered shares trade together in the market.

Not necessarily.

An aftermarket purchaser can potentially bring a Section 11 claim if the investor satisfies Section 11's requirements, including the necessary relationship between the securities purchased and the challenged registration statement.

The Supreme Court's Slack decision emphasizes that the shares must be traceable to the particular registration statement at issue.

Securities Act complaints frequently also assert:

Section 12(a)(2)

Section 12(a)(2) addresses specified material misstatements or omissions in a prospectus or oral communication by a statutory seller.

Section 15

Section 15 provides for potential liability of persons who control persons liable under specified Securities Act provisions.

The precise claims depend on the offering structure and facts.

In some circumstances, yes.

The Securities Act provides concurrent jurisdiction in specified circumstances, and the Supreme Court held in Cyan, Inc. v. Beaver County Employees Retirement Fund that SLUSA did not strip state courts of jurisdiction over class actions alleging only Securities Act claims or authorize removal of those covered cases to federal court.

By contrast, Exchange Act claims such as Section 10(b) claims fall within the Exchange Act's exclusive federal-jurisdiction provision.

Yes.

Private securities-fraud claims governed by 28 U.S.C. §1658(b) generally must be brought by the earlier of:

• two years after discovery of the facts constituting the violation; or
• five years after the violation.

Section 11 and Section 12(a)(2) claims have a different statutory limitations and repose structure under Securities Act Section 13, including one-year discovery-based provisions and an outside three-year period described in the statute.

Because these deadlines can be claim-specific and fact-sensitive, shareholders with substantial losses should not assume that the PSLRA lead-plaintiff deadline is the only relevant deadline.

Class certification determines whether the case can proceed on behalf of the defined group.

Under Rule 23, the certification order defines:

• the class;
• the class claims, issues, or defenses; and
• class counsel.

For a Rule 23(b)(3) damages class, class members receive the best notice practicable under the circumstances and must be informed of their right to request exclusion.

A qualifying member of a Rule 23(b)(3) class may generally ask to be excluded, or “opt out,” from the class by following the court-approved notice instructions.

An investor who properly opts out is generally not bound as a class member by the eventual class judgment and may preserve the ability to pursue an individual claim, subject to applicable law and deadlines.

Whether opting out makes economic or strategic sense depends on the investor's circumstances, including:

• size of losses;
• potential claims;
• litigation costs;
• statutes of limitation and repose;
• available evidence; and
• anticipated class recovery.

Rule 23 requires class notice to explain the right and procedure for requesting exclusion.

Generally, a Rule 23(b)(3) class operates on an opt-out, rather than opt-in, basis.

If an investor falls within a certified class definition and does not properly request exclusion, that investor generally remains within the class and can be bound by the judgment.

This is different from filing a settlement claim form. A class member may remain part of the class but later need to submit a timely proof of claim to receive money from a settlement.

A class-action settlement cannot simply be agreed to privately by the parties and imposed on the class.

Rule 23 requires court approval of a settlement that would bind the class.

The court evaluates whether the proposed settlement is fair, reasonable, and adequate, including the adequacy of representation, arm's-length negotiation, adequacy of relief, proposed distribution process, attorneys' fees, and equitable treatment of class members.

Class members generally receive notice explaining the settlement and their rights.

Eligible class members usually must submit a proof of claim and release or similar claim form by the deadline in the settlement notice.

The claimant may be required to provide:

• name and contact information;
• brokerage account information;
• dates of purchases;
• number of shares purchased;
• purchase prices;
• sales;
• sale prices;
• shares retained; and
• supporting brokerage records.

A claims administrator reviews the submissions under the court-approved plan of allocation.

Usually, an investor's actual market loss is not the same as the investor's legally recognized claim.

Settlement payments generally depend on factors such as:

• the alleged artificial inflation on purchase dates;
• disclosures affecting inflation;
• sale dates;
• shares retained;
• applicable damages rules;
• the settlement amount;
• the total value of valid claims; and
• the court-approved plan of allocation.

Eligible investors typically receive a pro rata portion of the available settlement fund based on recognized claims rather than simply receiving every dollar by which their investment declined.

The PSLRA also contains provisions governing settlement disclosures and attorneys' fees.

In a successful class action, plaintiffs' counsel generally seek attorneys' fees and reimbursement of litigation expenses from the recovery, subject to court approval.

The PSLRA provides that attorneys' fees and expenses awarded to plaintiff class counsel may not exceed a reasonable percentage of the damages and prejudgment interest actually paid to the class. Rule 23 also provides procedures for judicial review of class counsel's fee request and permits class members to object.

A passive class member generally does not separately hire class counsel simply to remain a class member.

Yes.

Rule 23 permits class members to object to a proposed settlement requiring court approval.

The objection must identify whether it applies to the individual objector, a subset of the class, or the entire class and must state the grounds with specificity.

Class members may also object to a motion for attorneys' fees.

If an investor believes a securities-law violation may have occurred, useful records can include:

• monthly brokerage statements;
• trade confirmations;
• purchase dates;
• sale dates;
• purchase and sale prices;
• option transaction records if relevant;
• retirement-account trading records;
• merger or offering materials;
• prospectuses;
• emails concerning investment transactions;
• records of transfers between brokers; and
• other materials establishing trading history.

For lead-plaintiff applications in particular, complete transaction information is important because financial interest and losses must be analyzed.