Bank of America's metals head forecasts silver at $135-$309 ...
Spot silver plunged over 3% to $80.54 per ounce on March ...
Silver has surged past $90 per ounce amid rising industrial ...
Silver price tumbled below $81 per ounce as US dollar index ...
Spot silver crashed to $81.34 on March 14 as a resilient ...
With COMEX closed for 63 hours amid escalating Iran war ...
