Schwab (SCHW) is up 80 cents to $18.51 and more than 15K Sep 20 calls traded today, compared to open interest of 6,248. Recent trades include a multi-exchange sweep of 6500 contacts for 45 cents. Looks buyer driven. Sep 19 calls trading at the offer as well. Implied volatility, meanwhile, is moving up to 41, from about 36 late yesterday.