While nobody knows what the rest of the year has in store for the stock market, longtime investor Warren Buffett has some timeless advice for handling periods of uncertainty. In 2008, in the thick of the Great Recession, Warren Buffett wrote a piece for The New York Times to help ease Americans' concerns about the future of the stock market.

In 1998, Buffett shared his belief that investors should “only buy something that you'd be perfectly happy to hold if the market shut down for ten years.” Data from Finimize also proves that in general, the longer your investment horizon is, the less likely you are to suffer a loss.