Crocs (CROX, news, chart, volatility) is seeing bulling trading ahead of an earnings report due out after the closing bell. The stock is up 38 cents to $2.89 and volume in the options market is running double the usual. More than 5,000 calls have traded, compared to 97 puts. The November 4 calls are the most actives, with 2,100 contracts traded and 99 percent of today’s volume traded on the offer. Open interest is 771 contracts, suggesting opening call buying ahead of the earnings report. Similar action is being seen in the December 3 and January 4 calls. Implied vols are easing a bit after moving above 200 last week, down to 160 Monday morning. No other news on the stock today.