China's speculative traders sent silver soaring and crashing in a volatile run

Silver's sharp reversal followed analyst warnings that the rally was outpacing underlying fundamentals.

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• Silver's white-hot rally is unraveling after traders rushed to lock in profits, sending prices sharply lower.
• A China-driven speculative surge and surprise Fed news jolted the market, triggering a rapid selloff.
• Rising margin requirements are adding to ongoing market instability.

Silver prices crashed in a harrowing roller-coaster...