Haselkorn & Thibaut, P.A., operating as Investment Fraud Lawyers, is tracking the case of Daniel Gustavo Diaz, a former Merrill Lynch broker whose 37-year career ended with a FINRA bar in 2026. Investors who worked with Diaz while he was at Merrill Lynch or Raymond James should review their account statements and trading records now. Time limits apply to securities claims.
This article explains what public records show about Diaz, why FINRA barred him, and what investors can do if they believe they suffered losses.
Who is Daniel Gustavo Diaz?
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Daniel Gustavo Diaz, CRD number 1715827, began his securities career at Kidder, Peabody & Co. in 1987. He joined Merrill Lynch two years later and spent nearly four decades at the firm, most recently as a senior international financial advisor in Miami, Florida.
According to his BrokerCheck report, Diaz worked primarily with international customers. He left Merrill Lynch in 2025, joined Raymond James & Associates for four months, and is no longer registered as a broker or investment adviser representative.
Why Merrill Lynch fired Diaz in 2025
Merrill Lynch discharged Diaz in February 2025. The firm reported that he failed to follow management’s decision to apply discounts to commissions for certain customer accounts.
The discharge filing also led FINRA to investigate Diaz for potential involvement with excessive commissions related to certain securities transactions. He did not admit or deny wrongdoing as part of the settlement that ended the case.
Diaz briefly moved to Raymond James in May 2025 but left after four months. Public registration records show he is no longer associated with any FINRA member firm.
FINRA bars Diaz after he refuses testimony
In July 2026, the Financial Industry Regulatory Authority barred Daniel Gustavo Diaz from associating with any FINRA member firm in any capacity. The bar followed Diaz’s refusal to appear for on-the-record testimony under FINRA Rule 8210.
FINRA Rule 8210 gives the regulator authority to compel testimony and documents from registered representatives during investigations. Refusing to cooperate is itself a violation of FINRA Rules 8210 and 2010, even if the underlying allegations are never proven.
A FINRA bar means Diaz cannot work for a broker-dealer or otherwise associate with a FINRA member. It does not, by itself, create a private right of action for investors. However, it can support an investor’s claim that the advisor’s conduct was serious enough to warrant industry-wide exclusion.
What BrokerCheck shows about Diaz’s history
Diaz’s BrokerCheck report discloses one customer dispute and one criminal event. The customer claim, filed in 1996, sought $500,000 and settled for $20,000 to avoid litigation costs. The criminal disclosure involves a 2001 grand theft charge for which Diaz completed a pre-trial diversion program.
Merrill Lynch’s 2025 termination does not appear on the customer-facing BrokerCheck summary, which only includes reportable events that caused customer harm. The termination filing is still significant because it triggered FINRA’s investigation and the subsequent bar.
| Disclosure type | Year | Summary |
|---|---|---|
| Customer dispute | 1996 | Claim seeking $500,000 settled for $20,000 to avoid litigation costs. |
| Criminal event | 2001 | Grand theft charge; pre-trial diversion program completed. |
| Employment termination | 2025 | Merrill Lynch discharged Diaz for failing to apply commission discounts as directed. |
| Regulatory action | 2026 | FINRA barred Diaz after he refused to provide on-the-record testimony. |
Why the commission issue matters for investors
Commission discounts are not a courtesy. They are part of the cost structure disclosed to clients when accounts are opened. When a broker overrides or ignores agreed-upon discounts, clients pay more than they expected for trades and advisory services.
Excessive commissions can erode portfolio returns, create conflicts of interest, and violate the duty of fair dealing that brokers owe their customers. Firms have an obligation to supervise trading activity and ensure that clients receive the pricing they were promised.
Investors who worked with Diaz should check whether their account statements reflect commission charges that differ from what they were told. They should also compare trade confirmations against any fee or commission schedules they signed.
Firm supervisory responsibility
Broker-dealers must supervise the conduct of their registered representatives. Merrill Lynch had a duty to monitor Diaz’s trading, commission practices, and customer interactions. Raymond James also had a duty to supervise him during the months he was registered there.
When a firm fails to detect or stop misconduct, the firm can be held responsible alongside the individual broker. This is why investors with claims against Diaz may also have claims against the firms that employed him.
What investors who worked with Daniel Gustavo Diaz can do
If you had an account handled by Daniel Gustavo Diaz at Merrill Lynch or Raymond James, start by gathering your records. Look for trade confirmations, account statements, fee schedules, and any written communications about commissions or discounts.
Common warning signs include unexplained commission charges, trades you did not authorize, investments you did not understand, and returns that lagged the market despite active trading. If you see any of these patterns, consult a securities attorney promptly.
FINRA arbitration is one path to recover losses. Most brokerage customer agreements require arbitration rather than court. There are deadlines for filing claims, so waiting can forfeit your right to recover.
How Investment Fraud Lawyers can help
Haselkorn & Thibaut, P.A., operating as Investment Fraud Lawyers, represents investors nationwide in FINRA arbitration and securities litigation. The firm has recovered more than $400 million for victimized investors and works on a contingency fee basis.
We can review your account records at no charge and advise whether you have a viable claim against Daniel Gustavo Diaz, Merrill Lynch, Raymond James, or related parties. Call 1-888-885-7162 or contact us online for a free case evaluation.
Frequently asked questions
What is Daniel Gustavo Diaz’s CRD number?
Daniel Gustavo Diaz’s CRD number is 1715827. The CRD is the unique identifier FINRA uses to track registered brokers and investment advisers.
Why was Daniel Gustavo Diaz barred by FINRA?
FINRA barred Diaz after he refused to provide on-the-record testimony under FINRA Rule 8210. The investigation was related to allegations that he failed to apply commission discounts and may have been involved with excessive commissions.
Did Diaz admit to misconduct?
No. Diaz accepted the bar without admitting or denying the allegations as part of the settlement with FINRA.
Can investors still file a claim against Diaz even though he is barred?
Yes. A FINRA bar does not prevent investors from pursuing claims. Investors may file FINRA arbitration claims against Diaz and the firms that employed him, subject to filing deadlines and the terms of their account agreements.
What should I look for in my account statements?
Look for commission charges that exceed your disclosed schedule, trades you did not authorize, and investments that do not match your stated objectives. Also compare any promised commission discounts against what was actually charged.
Disclaimer: Past results do not guarantee future outcomes. This page provides general information and is not legal advice. No attorney-client relationship is formed by reading this content.
There is no guaranteed recovery in any securities matter. Consult a qualified attorney regarding your specific situation.
