Execution risk that they can’t handle. When you buy/sell stock on Robinhood, they hold execution risk until they net out your position by transacting a large en

Execution risk that they can’t handle. When you buy/sell stock on Robinhood, they hold execution risk until they net out your position by transacting a large enough order on the market. In this situation they don’t know how to manage the execution risk on these trades, so they are losing money, so they don’t want to do them.