ACM Research (ACMR) very unusual buys of 3800 Nov. $28.33 calls for $0.50 with stock at 15.50, the $970M wafer-cleaning play trades 16.75X Earnings and just 2X Cash. ACM Research shares recently came under selling pressure over delisting concerns about requirements to comply with provisions of the U.S. Holding Foreign Companies Accountable Act, or HFCAA, a major overhang, if lifted, could rally shares sharply