SEC Tweaks Trading Lots: Because Round Numbers Matter in Wall Street
Published Date: 12/10/2025
Notice
Summary
NYSE Texas is updating its Rule 7.5 to match the new official definition of a 'round lot' from Regulation NMS, which took effect in November 2025. This change affects traders and brokers by clarifying what counts as a standard trading unit, helping keep things clear and consistent. The update is already in effect, so everyone can trade with confidence under the new rules right away.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Round-Lot Rule Aligned With Reg NMS
On November 25, 2025, NYSE Texas amended Rule 7.5 so its definition of a “round lot” follows Regulation NMS. Under the Reg NMS definition (implemented the first business day of November 2025), a round lot is: 100 shares for stocks with an average closing price of $250.00 or less; 40 shares for $250.01–$1,000.00; 10 shares for $1,000.01–$10,000.00; and 1 share for $10,000.01 or more. This change clarifies for traders and brokers what counts as a standard trading unit.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Take It Personal
Get Your Personalized Policy View
Start a Free Government Policy Watch to see how policy affects your household, then upgrade to PRIA Full Coverage for year-round monitoring.
Already have an account? Sign in