Imagine you& #39;ve been following a company for years, but its stock always seemed too expensive for you to buy. A time traveler visits you from the future and claims, "Let& #39;s say there& #39;s a situation where that company& #39;s revenues plummet due to a temporary crisis.

The business loses a lot of money, but easily survives due to a strong financial position, cost cutting, and access to capital. Over time, it makes a full recovery and continues to grow, and the stock soars over the next several years.

But during the shut down period the stock is down 50%. Would that be an attractive enough price for you to finally make your long-term investment?"

You say, "Of course. If only I could be so lucky."

He says, "Well, this actually happens. But you never buy it because you keep staring at your screen, speculating that it might trade even lower. You miss the whole opportunity."