Photo by David McNew/Getty ImagesGetty ImagesAmazon.com (AMZN) has faced challenges previously. Its stock has dropped by more than 30% within a period of less than 2 months on three separate occasions in various years, erasing billions in market capitalization and eliminating substantial gains in a single correction. If past performance serves as an indicator, Amazon.com (AMZN) stock is not shielded from unexpected, sharp declines.The Risk That Is BrewingRegulatory Action. Amazon encountered a $2.5B FTC pen ...