NYSE Redefines Round Lots: Trading Units Get a National Sync-Up
Published Date: 11/21/2025
Notice
Summary
The New York Stock Exchange (NYSE) is updating its rule about what counts as a 'round lot' of shares to match a new national standard starting November 2025. This change affects traders and investors by adjusting how shares are grouped for trading, but it won’t cost anyone extra. The update kicks in right away and keeps trading smooth and clear.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Round Lot Definition Update
If you own or trade stocks on the NYSE, the Exchange will change what counts as a “round lot” starting November 3, 2025. Under the new rule a round lot will be: 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. The Exchange says this aligns its Rule 7.5 with Regulation NMS and will not impose extra costs.
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