According to the Financial Times, on Thursday, Robinhood Inc. granted an exception to its rule on short positions for consumers who had profitable “puts” against insolvent lender Signature Bank (NASDAQ:SBNY).

Put options are agreements that grant a buyer the right, but not the requirement, to sell shares in the future.

The third-largest failure in U.S. banking history, shares of New York-based Signature have lost over 37% in four trading days since regulators took control of the bank on Sunday.

Two days after California regulators shut down Silicon Valley Bank on Friday, which increased worries about contagion and led to a sell-off in financial stocks, Signature collapsed.

The investors stood to earn significantly if the share price of Signature fell before the contracts expired because they had purchased short-dated options on Robinhood (NASDAQ:HOOD).

According to the report, on Thursday Robinhood informed clients holding profitable positions on Signature that it would make an exception to its policy and permit them to exercise their options contracts for Friday’s expiration date.

Robinhood did not immediately answer a Reuters request for comment, and Signature Bank declined to comment.