NEW YORK – A gradual decline in the stock market turned into a rout Friday.
After moving between small losses and gains for most of the day, the stock market plunged in the final hour of trading. The Dow Jones industrial average lost more than 200 points, half of them in the last 15 minutes. It was the worst drop in six weeks.
Some traders said the afternoon swoon came as large investors rearranged their holdings to match changes in the widely followed MSCI indexes. Others said rapid-fire automated sell programs kicked in as the decline accelerated, exacerbating the loss.
By late Friday, the market looked like it was “feeding on itself,” said Mark Luschini, chief investment strategist at Janney Montgomery Scott. “Why did we go from trading flat to down 200 points at the close? It suggests to me that it was driven by computer models.”
Traders and investors have started to question whether this year’s record-setting rally has run its course. Concern is building that the Federal Reserve may slow its $85 billion bond-buying program. The program has supported the stock market as investors move money out of bonds and into riskier assets. The bond purchases also hold down long-term interest rates to encourage borrowing and spending.
The late afternoon slide in stocks caught many market-watchers by surprise. Big investors may have gotten spooked at the end of the day and sold, says Steven Ricchiuto, chief economist at Mizuho Securities.
“In a thin market, all you need is one or two big money managers to reassess their view and the market can go down quickly,” Ricchiuto said.
MSCI, originally known as Morgan Stanley Capital International, provides a range of global stock indexes that professional investors track to measure their performance. The company reviews its indexes twice a year, adding some stocks and removing others.
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