You can cope with turbulence...As a passenger and an investor

If you’re like many travelers, you get a little nervous when your airplane goes through some turbulence. And if you’re like a lot of investors, you may get somewhat jumpy when the financial markets are volatile. Yet flight turbulence probably isn’t as scary as it seems, and the same may be true for market volatility — if you know how to respond.

Let’s look at some positive responses to market movements:

• Don’t overreact to turbulence. Turbulence happens on most flights, but passengers are well aware that they can’t “bail out” at 30,000 feet, so they generally don’t panic. As an investor, you...