StoneX Group shares are lower in Tuesday trading as the market digests a stock-split adjustment, which mechanically reduces the quoted share price and can create apparent downside on price screens even when company value is unchanged. The move aligns with the company’s 3-for-2 split that was implemented via a stock dividend, increasing share count and lowering the per-share trading price.

StoneX’s board approved a three-for-two split that was effected as a stock dividend, with additional shares distributed after the close on March 20, 2026 to holders of record on March 10, 2026, and split-adjusted trading expected to begin March 23, 2026. The Options Clearing Corporation memo also flagged March 23, 2026 as the split ex-date, which is when the market typically reflects the new split-adjusted pricing and contract terms.

Stock splits don’t change market capitalization by themselves, but they frequently cause temporary distortions in quote history, percentage-change calculations, and trading behavior across common shares and options. That can lead to screen-driven selling or algorithmic rebalancing—especially around the first sessions where data vendors and brokerage systems fully normalize split-adjusted prices and historical charts.