Silver's 19% Slump Spooks Commodity Traders

By Tatyana Shumsky Of DOW JONES NEWSWIRES NEW YORK (Dow Jones)--Sharp declines in silver prices spooked markets Wednesday, leading to selling across the commodities sector as funds reduced their exposure to hard assets.Managed funds investing in resources often hold a wide variety of commodities, leading to board-based selling as they exit those markets."When they're long one commodity

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