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Few bets have been smarter this year than wagering on Amazon's success, and against its top competitors. And now short-selling by investors suggests an increasing consensus that Amazon will not only continue to weaken its retail rivals, but soon dominate markets for fresh groceries and auto parts.
What this chart shows: "Short interest" measures the total bet against a company through short selling, a tactic in which investors bet that the share price of a company will drop.