Bank of America Tightens Block Trade Rules

Bank of America tightened its block trade guidelines after an Esprit deal that now sits at the center of a criminal trial in Hong Kong, according to testimony heard Monday.

The disclosure adds a new layer to a case already drawing attention across finance and legal circles. Reports indicate the policy shift came months after the transaction, suggesting the bank reviewed how it handled a type of trade that can move markets and test internal controls. The court heard the change in the context of proceedings involving a well-known hedge fund, though the summary available does not detail the full scope of the allegations.

The court testimony points to a familiar pattern in finance: a controversial deal can reshape the rules long after the trade itself is done.

Block trades occupy a sensitive corner of the market. They involve large share sales that banks often arrange discreetly, and even small lapses in timing, information handling, or oversight can trigger major questions. When a bank updates its guidelines after a disputed deal, regulators, investors, and defense lawyers all have reason to examine what changed and why.

The timing matters. A post-deal rule change does not by itself prove wrongdoing, but it can sharpen questions about whether existing safeguards matched the risks at the time. Sources suggest the trial will continue to probe decision-making around the Esprit transaction and the handling of market-sensitive information.

What happens next will matter beyond one courtroom. The case could influence how banks structure block trades, how compliance teams document decisions, and how prosecutors frame similar cases in the future. For markets that rely on trust as much as speed, even a narrow policy revision can signal a broader shift in how risk gets managed.