PMC Sierra (PMCS), a Santa Clara, CA chipmaker, is off 15 cents to $7.36 and options volume is 32.5X the recent average daily, driven by apparent Nov 7.5 call writers. 13.4K traded. The top trade is 1795 on the 80 cent bid and was part of a sweep of 4900 contracts. Implied volatility is down about 4 percent to 44. No equity blocks traded. Earnings due July 22, after market.