As a retirement investor, you are supposed to take the long view—ignoring one-day (or one-week) plunges in the stock market, sticking to your financial plan, and staying focused on a finish line that may be decades away. But you’re also a human being, who reads the news and wonders what a 588-point, one-day drop in the Dow has done to your 401(k) or IRA balance. This is your nest egg, after all. So after last week’s pullback in stock prices and today’s gut-wrenching drop, you couldn’t be blamed for sneaking a peek, even if it’s better not to check in daily. Have you?