As of November 3, 2025, the Securities and Exchange Commission (SEC) adopted amendments to certain rules of Regulation National Market System (Regulation NMS), one of which was introducing a new price-tiered round lot framework for NMS stocks. Under the new framework, round lot sizes are scaled to share price: 100 shares for stocks priced at or below $250, 40 shares for stocks priced between $250 and $1,000, 10 shares for stocks between $1,000 and $10,000 and one share for stocks priced above $10,000.

Q1 2026 saw record trading volumes in European equities, driven by strong investor interest and ongoing geopolitical developments. For Cboe Europe, it was a record quarter as we retained our position as Europe’s largest equities exchange.

U.S. equities total market Average Daily Volume (ADV) rose 2.3% month-over-month to 20.5 billion shares, surpassing February 2026 record volume and up 27.8% year-over-year.