WEEKEND INVESTOR --- Playing the Market Plunge --- The Return of Volatility Has Investors on Edge; Here's What to Do Next
Lest anyone had thought the rally of the past 14 months had restored calm to the stock market, Thursday's trading action was a reminder that the investing game is as dicey as ever.</br></br>During one brief afternoon spasm in which the Dow Jones Industrial Average plunged nearly 1,000 points, happy assumptions about the markets' solid footing and the U.S. economy's enduring recovery were wiped away. More selling on Friday reinforced the growing sense of unease.</br></br>"People had been thinking, 'Oh, that [global financial crisis] thing; I'm glad that's over,' and we're back to the races again," says Rob Arnott, chairman of Research Affiliates, a Newport Beach, Calif., investment firm. "But when expectations are that everything is fine again, a bolt from the blue can come from anywhere to send this market lower very quickly. It's a wake-up call that risk remains in the system."</br></br>Most unsettling was the apparent lack of an explanation for Thursday's violent swing. With the Greek debt crisis as a backdrop, some pointed to glitches in computer-trading programs. But upsets in a mechanism as complex as the global financial markets have no simple causes. Regulators and economists are poring over the trading tape in search of an answer.</br></br>It wasn't only individual stocks that were whipsawed. Several exchange-traded funds-portfolios that are listed on stock exchanges-traded at zero for a spell on Thursday. One, Vanguard Industrials, a basket of 372 stocks, fell from $54.66 to zero at 2:46 pm, then shot back up around $40 by 2:48 pm, then crashed right back down to 20 cents at 2:54 pm, then leaped back up by $54 by 3:06 pm.