Given the way the stock market's been jumping around lately -- stomach-wrenching dives, followed by dramatic rebounds -- I can understand why you're not sure whether to stay or go.
On the one hand, the U.S. economy seems to be cruising along nicely. So this bull market may have more room to run. At the same time, the recent drop in oil prices and ultra-low yields on U.S and foreign government bonds may be signaling slower growth abroad and potential losses for the U.S. stock market ahead.