The 10-year Treasury note's yield soared to 5.15 percent by late afternoon from 5.09 percent late yesterday, reigniting worries among stock investors about high rates thwarting corporate deal-making and the further injuring the limping housing market.

The stock market started reacting violently to Treasury yields two weeks ago when the 10-year yield surged past 5 percent for the first time since last summer. Wall Street had traded more mildly in recent days as yields retreated from last week's peak of nearly 5.30 percent, but today's yield advance stoked fears that they could resume their climb.

"People are watching this 10-year, and it looks like it might want to go back to 5.25," said Todd Leone, managing director of equity trading at Cowen & Co. Until last week, the 10-year Treasury yield had not traded consistently above 5.25 percent since 2002.

Furthermore, Leone said, the private equity deal-making wave, which was a main driver for the market for several weeks, seems to have slowed down a bit compared to last month. "The guys are doing a little more homework, and there aren't as many companies to grab up."

Home Depot's $22.5 billion buyback today initially lent some support to the market, as did stronger-than-expected quarterly earnings from Morgan Stanley and a retreat in oil prices after the Energy Department reported U.S. crude and gasoline inventories rose last week. But the market eventually caved, after investors decided the positive news wasn't enough to warrant a return to record territory.

The market was also pressured by news of troubles at two of Bear Stearns Cos.' hedge funds. Financial firms took a hit: Bear Stearns, JPMorgan Chase & Co. and Merrill Lynch & Co. all fell more than 2 percent.

According to preliminary calculations, the Dow fell 146.00, or 1.07 percent, to 13,489.42, after bobbing in and out of positive and negative territory earlier in the day.

Broader stock indicators also tumbled. The Standard & Poor's 500 index declined 20.86, or 1.36 percent, to 1,512.84, and the Nasdaq composite index fell 26.80, or 1.02 percent, to 2,599.96.

Home Depot, one of the 30 Dow components, rose $1.76, or 4.6 percent, to $40.03 after announcing it will buy back more than a quarter of its shares and sell its Home Depot Supply business to a group of private equity firms for $10.3 billion.

Another positive piece of news was FedEx Corp.'s report that its fiscal fourth-quarter profit rose 7 percent, boosted by an 8 percent increase in revenue and higher package volumes. FedEx rose $1.74 to $109.80.

Morgan Stanley also posted a strong rise in quarterly profit, but the second-largest U.S. investment bank turned lower by 48 cents to $87.32 as rest of the financial sector wilted.

In other corporate news, Nuveen Investments Inc. rose $8.98, or 16.6 percent, to $63.14, after the investment manager said it agreed to be acquired by a private equity group led by Madison Dearborn Partners LLC for $5.42 billion in cash.

But in a sign that takeover activity might be cooling, billionaire Kirk Kerkorian's investment arm said it was ending discussions to potentially buy MGM Mirage's Bellagio hotel-casino and CityCenter project. The casino operator fell $5.90, or 7.1 percent, to $80.38.

Today was light on U.S. economic data: Tomorrow will bring the Labor Department's weekly jobless claims report, the Conference Board's index of leading economic indicators and the Philadelphia Federal Reserve's June index of business activity. The reports have the potential to move the Treasury markets.

Last week, applications for home loans fell 3.4 percent as mortgage rates — closely tied to the 10-year Treasury yield — increased, the Mortgage Bankers Association said today.

Larry Peruzzi, senior equity trader at The Boston Company Asset Management, noted that while high yields are worrisome, the yield curve is more normal now, which should be positive for stocks going forward.

The yield curve is the difference between short-term yields and long-term yields; analysts note that the rise in long-term bond yields has brought the relationship to a more normal pattern, rewarding long-term risk with higher returns. The pattern now suggests "steady growth — not spectacular, but somewhat steady," Peruzzi said. Before, the yield curve had pointed to a slowdown in growth.

The dollar was mixed against other major currencies, while gold prices fell.

Light, sweet crude oil futures dipped 91 cents to $68.19 a barrel on the New York Mercantile Exchange, and gasoline futures also retreated. The government said today in its weekly inventory report that crude oil stockpiles rose 6.9 million barrels last week and gasoline stockpiles rose 1.8 million barrels.

Declining issues outnumbered advancers by more than 3 to 1 on the New York Stock Exchange, where volume came to 1.67 billion shares, up from 1.46 billion yesterday.

The Russell 2000 index of smaller companies fell 12.16, or 1.43 percent, to 836.18.