Netflix is down ~20% since it was reported that Bill Ackman sold his position on April 21

Price on April 21 open: $220
Price today at open: $176.01

This sub often talks about holding on to your losers since stocks always go up and it will eventually recover as well as throwing shade at an investors who sell at a loss, but if Ackman was/is able to use the money he received from the sell and generate better than a -20% return since then he's coming out ahead. There should be a strong consideration for concepts like Opportunity Cost when determining what to do with under performers.