Red-hot silver is 'almost guaranteed' to plunge 50% in the next year, JPMorgan's former quant chief says

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• Silver is at records, but former JPM strategist Marko Kolanovic predicts a significant drop is coming.
• The metal's rise looks unsustainable, he says, predicting a crash coming within a year.
• Kolanovic warns that bubbles in commodities don't last.

Silver prices have soared, but one prominent market strategist thinks the rally's days are numbered.

Marko Kolanovic, the former quant chief at JPMorgan, predicts...