Parents know all too well that a teenager's mood can change on a dime. A careless comment from a buddy on Snapchat, four tests in one day, or not enough sleep/money/time can quickly turn even the best son or daughter into the stereotypical surly teen.
Like teenagers, technology stocks have proven that they, too, can turn on a dime: After dominating the broader market for some time, the Morningstar US Technology Index is down more than 13% during the past three months as of this writing. That's well below the broader market's 7% decline during that same period.
Susan Dziubinski does not own shares in any of the securities mentioned above. Find out about Morningstar's editorial policies.