To address the impact of the maker-taker model, we focus on
a subset of securities in the pilot group with prices such that the postchange
total fee of 12.5 cents per 100 shares was close to the postchange 1.8 basis
point total fee of the securities that did not switch to maker-taker pricing.
Any change observed for this “fee-neutral” subset can then be attributed to the
breakdown of the total fee into the maker rebate and taker fee.
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