A securities arbitration claim can look solid on paper and still lose momentum at the hearing stage. That’s because FINRA hearings are where documents, witness testimony, credibility, timing, and procedure all come together. Even when an investor’s underlying facts are compelling, avoidable mistakes in presentation and preparation can make an otherwise persuasive case feel disorganized, incomplete, or harder for arbitrators to follow.
In this post, you’ll learn eight common hearing mistakes that can weaken a strong securities case, why they matter in FINRA arbitration, and what investors often overlook as the final hearing approaches. If you want a broader overview of how evidence, witnesses, records, and final decisions fit together, it may help to start with this guide to what happens during the hearing and award phase.
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FINRA describes the arbitration hearing as the stage where parties present evidence, call witnesses, and make closing arguments before arbitrators issue a final, binding award. FINRA also notes that the hearing recording becomes the official record unless the panel permits a transcript arrangement by a party, and explained decisions are available only if all parties make a joint request at least 20 days before the first scheduled hearing date (FINRA arbitration process; FINRA decision and award page; FINRA Rule 12514). In practical terms, that often means hearing preparation is not just administrative housekeeping. It is a major part of how the case is understood.
The SEC’s investor education materials also explain that broker-dealer/customer arbitration typically involves discovery followed by an evidentiary hearing, which is the investor’s opportunity to put the case in front of decision-makers outside a traditional courtroom (Investor.gov bulletin). A case with strong losses, troubling account activity, or serious suitability concerns may still face problems if the hearing presentation feels scattered or unsupported.
One common mistake is assuming the hearing is simply a chance to “tell your side of the story” informally. FINRA arbitration is often less formal than court, but it is still a structured evidentiary proceeding. Arbitrators hear testimony under oath, review exhibits, evaluate objections, and decide relief based on the record presented (FINRA arbitration process).
When a claimant enters the hearing without a clear theory of liability, a timeline of events, and a disciplined presentation of proof, strong facts can get buried. Arbitrators may be hearing multiple days of testimony, detailed account records, communications, internal firm documents, expert opinions, and competing narratives. If the claimant’s presentation jumps from one issue to another without a roadmap, key misconduct can lose force.
In many securities cases, the legal and factual issues are technical: unsuitability, excessive trading, misrepresentation, unauthorized trading, concentration risk, due diligence failures, supervision problems, or elder exploitation concerns. A hearing presentation that leaves those concepts implicit rather than clearly connected to testimony and exhibits can make the case harder to evaluate.
An attorney with documented experience in highly similar matters may be able to turn a complicated investment story into a sequence that arbitrators can follow: who said what, when the recommendation was made, what the account records show, what risks were disclosed or omitted, and how damages developed over time.
This is one of the most damaging hearing-stage mistakes because it can affect what the panel even allows into evidence. Under FINRA Rule 12514, parties generally have to exchange documents and other materials they intend to use at the hearing, along with witness lists, at least 20 days before the first scheduled hearing date. The rule also states that parties may not present undisclosed documents or witnesses unless the panel finds good cause, with limited exceptions such as rebuttal or impeachment (FINRA Rule 12514).
That deadline matters more than many investors realize. A claimant may think, “I have the proof, so I can bring it to the hearing.” But if the proof was not exchanged on time, the panel may limit or exclude it. The same problem can apply to a witness whose testimony seems important but was not properly disclosed.
FINRA’s discovery guidance also explains that sanctions for discovery failures can include monetary penalties, attorneys’ fees, adverse inferences, and even restrictions on presenting evidence (FINRA discovery page; Notice to Members 07-07).
In real-world terms, this can weaken a case in at least three ways: