amid the broader retail bloodbath on wednesday shares of costco wholesale corporation cost tanked more than 12 in their worst performance since 2003 on cnbcs options action tony zhang said the stock traded almost 5 times its average daily put on wednesday check out other retail stocks making big moves in the premarket a trader purchased 800 of the june 370350 put spreads at 190 per contract on average zhang stated the trader “is betting that this carnage is not over” and is risking about 150000 in premium on the expectation of costco wholesale’s stock declining by as much as 18 by june expiration he added