I think many people risk the same sort of over-caution this time (but, of course, everyone has to act based on their comfort level and not pronouncements by strangers).
[link|http://flagship4.vanguard.com/VGApp/hnw/VanguardViewsNCArticle?chunk=/freshness/News_and_Views/all_sidelines_0730_ulm5_1028041178_ecmSYS.html|Here].
Here are three important reasons that shifting to the sidelines is a risky strategy:
The crystal ball is cloudy: It's unlikely that you'll know when it's "safe" to buy stocks. What will the signal be? A week or two of rising prices? We've seen such stretches several times since the bear market in stocks began in March 2000. How is an investor supposed to know when a rebound is temporary or the start of a new bull market? In bull markets, stock market averages drop nearly half of the time\ufffdstock prices fell on 46% of 4,452 trading days from August 13, 1982, to March 23, 2002, when the Dow Jones Industrial Average moved from 777 to 11,723. And stock prices have risen on 45% of the 582 trading days since the current bear market began on March 24, 2000.
Missing the party: You could pay a very high "opportunity cost" for being out of the stock market for even a short period when a recovery begins. Stock prices rarely move up or down in a steady fashion, especially early on in an up or down market cycle. From June 30, 1987, through June 30, 2002, the Standard & Poor's 500 Index posted an average annual return of 10.87%. But investors who missed only the 10 best days during that 15-year period would have earned far less\ufffdan average annual return of 7.22%. Many of those 10 best days followed periods of poor performance when a market-timing investor might have been tempted to be "on the sidelines." For example, the S&P 500 jumped 5.73% on July 24, 2002, and 5.41% on July 29, 2002, after weeks of steeply falling stock prices. We don't believe any mortal has the 20-20 foresight needed to time such sudden shifts.
[...]
Cheers,
Scott.