Commodities post sharp drops as a rising dollar vs. the euro pressures commodity assets. Metals sell off, with Comex Feb. gold tumbling $31.40, or 2.2%, to settle at $1564.10, March silver fell $1.51, or 5.7%, to end at $27.23, and March copper lost $0.05 to $3.36. ABX -3%, IAG -4%, SLW -4.5%, FCX -3.5%. WTI crude futures move below $100/bbl. in volatile trading.