Last week was a big option week for iShares Silver Trust (SLV).  The popular physical silver ETF got a boost as inflation concerns bubbled to the surface following a larger than expected jump in CPI.  Over 460,000 options traded in one day last week, with calls making up nearly 90% of the volume.  Calls tend to be used when the sentiment or behavior of the stock has been bullish.  A type of call spread traded about 9,000 times, which indicates a very bullish expectation of SLV by mid-January.