Why CVS Health Crashed 15.7% in October

Reports that the company is seeking to acquire Aetna, Inc. (NYSE: AET) in a deal valued at more than $66 billion sent shares in CVS Health (NYSE: CVS) tumbling 15.7% in October, according to S&P Global Market Intelligence.

CVS Health is at a crossroads. It's too big to benefit from small bolt-on acquisitions, and foot traffic at its stores could face a big threat if rumors that Amazon.com (NASDAQ: AMZN) will get into the pharmacy business are true.

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Source: Fool.com