Why shouldn’t people be allowed to do both? I don’t see much of an advantage to making the markets less agile. It would be nice to be able to buy and sell stoc

Why shouldn’t people be allowed to do both? I don’t see much of an advantage to making the markets less agile. It would be nice to be able to buy and sell stocks more than once a quarter, especially given plenty of events that do affect the perceived value of a company happen more frequently than that