复工了，散户大军也在撤退 When some retail-favorite stocks jumped on Tuesday, the day-trader crowd that has fueled the meme frenzy said it was time to go, selling stocks like AMC Entertainment Holdings Inc. for the first time since February, data compiled by Vanda Research show. That’s a continuation of the trend seen in August, when the participation of retail traders -- those buying or selling 10 contracts or less at a time -- slid to a 15-month low in the options market. The share of put options jumped to near a two-year high at a quarter of total volume, Options Clearing Corp.’s data analyzed by UBS Group AG show.