Pfizer (PFE) loses 17 cents to $16.52 and is one of 28 Dow stocks under water Friday morning (only MMM and CSCO are up). Meanwhile, in options action, PFE Jan calls are seeing interest. One of the top trades is 2094 Jan 17.5s at 18 cents on the ISE, and an opening customer buyer, according to ISEE data. 5200 now traded (98 percent Ask). Another 6200 Jan 20s changed hands (72 percent Ask). No news on the pharmaceutical maker today. Earnings were reported on 11/2. Shares are down 5.3 percent since that time.