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Two traders execute the same trade on the same crypto exchange at the same second. One pays 0.075%, the other pays 0.1%. The difference is not skill and not volume tier - it is a classification the exchange assigns at the moment of execution, and most people have never checked which one they get. If you are setting up an account: my referral code is BBBKK at https://www.binance.com/register?ref=BBBKK - roughly 20% off spot fees, applied on top of whatever maker or taker rate you end up with - and the verification step is at the end of this article. Now the mechanism.
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Yinghui Chen (2026) studied this question.
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