Here are today's Put/Call Ratio leaders… 1. Regeneron Pharmaceuticals (NASDAQ: REGN) 5,759 puts, 52 calls 2. Cemex (NYSE: CX) 7,697 puts, 199 calls 3. Saks Inc. (NYSE: SKS) 5,156 puts, 291 calls 4. McKesson Corp. (NYSE: MCK) 4,386 puts, 254 calls 5. Trina Solar (NYSE: TSL) 4,890 puts, 359 calls