That roaring sound you may be hearing today is the sound of silver soaring to new highs. The white metal smashed through $90 per troy ounce for the first time and peaked at $92.15 per troy ounce in morning trading in New York. It settled at a record $90.869, up 5.8%. Gold was rising to new highs, topping out at $4,650.10 per ounce before settling at $4263.30 an ounce, up 0.8%. There's talk prices could move higher, but my experience suggests the markets are becoming increasingly vulnerable to price blow-o ...