Qualcomm (QCOM) was down 15% after reporting earnings this week. If you had $5 million in QCOM, you lost $750,000 overnight. The premier San Diego company which faces changes in the mobile space, has announced massive layoffs and a stock buyback program. Some are calling for the company to be split up. The carnage in QCOM is the perfect example for why employees should diversify out of company stock in their retirement plans. Stories of employees who become instant billionaires dominate the media. Much more common are employees who are impoverished when their company stock heads south. Just as the odds are against you winning the lottery, they are against you being employed by the next Apple, or Tesla or Facebook. Invest with common sense.