Updated from 4:14 p.m. EDT

Stocks in the U.S. started off with gains Wednesday, but rising bond yields sent the major averages spiraling downward late in the session.

The

Dow Jones Industrial Average

slid 146 points, or 1.07%, to 13,489.42, despite a 4.6% jump in component

Home Depot

(HD) - Get Report

. The

S&P 500

fell 20.86 points, or 1.36%, to 1512.84, and the

Nasdaq

tumbled 26.80 points, or 1.02%, to 2599.96.

The latest shakiness came amid a pullback in long-term Treasuries, which have been a main focus of late because of a surge in yields. The 10-year note was down 10/32 in price, yielding 5.12%, and the 30-year bond was lower by 18/32, yielding 5.24%.

"The sudden rise in bond yields caught many on Wall Street off guard, and the reasons behind the push higher were numerous," said Robert Pavlik, chief investment officer with Oaktree Asset Management. "The market had decided to look past the benign core inflation readings and instead decided to refocus its attention on the overall numbers, which have been on the rise due to higher food and energy prices."

"A lot of participants have been looking to take money off the table, so once the momentum moved it kept rolling," said Art Hogan, chief market analyst with Jefferies. "In simple terms, the yield on the 10-year moved in the wrong direction for equities."

The downturn was the first decisive move that Wall Street has seen all week. The major averages were with little direction in the past two trading days, though on Tuesday the market found late strength to close a bit higher.

About 3.28 billion shares changed hands on the

New York Stock Exchange

, with decliners beating advancers by a 3-to-1 margin. Volume on the Nasdaq reached 2.01 billion shares, as losers outpaced winners 11 to 4.

"That momentum carried us lower after we turned due to energy stocks," Hogan continued. "There is also some concern in the financials. It's a reminder that the subprime issues will be with us for a while."

Among individual energy stocks,

Exxon Mobil

(XOM) - Get Report

,

Sunoco

(SUN) - Get Report

,

Marathon Oil

(MRO) - Get Report

, and

Occidental Petroleum

(OXY) - Get Report

all finished lower by 3.4% or greater.

After the following session, Home Depot announced plans for a $22.5 billion increase in its share buyback plan. The move, which was announced in conjunction with the $10.3 billion sale of the company's wholesale division, would cut Home Depot's shares outstanding by more than a quarter. The stock jumped $1.76 to $40.03.

Financial-services giant

Morgan Stanley

(MS) - Get Report

eased even after the company's second-quarter results easily beat estimates. Morgan Stanley posted second-quarter earnings of $2.45 a share and revenue of $11.52 billion. Shares were lower by 48 cents, or 0.6%, to $87.32.

FedEx

(FDX) - Get Report

rose, even though its report wasn't as upbeat. The shipping company said profits for the current quarter and possibly full year could fall short of analysts' expectations. Still, the stock added $1.74, or 1.6%, to $109.80.

Electronics retailer

Circuit City

(CC) - Get Report

swung to a fiscal first-quarter loss of $54.57 million, or 33 cents a share, compared with a profit of $6.37 million, or 4 cents a share, in the year-ago period. Circuit City also withdrew its guidance for the full year. Shares were higher by 3 cents, or 0.2%, to $16.10.

Rival

Best Buy

(BBY) - Get Report

, which slid nearly 6% in the previous session after first-quarter earnings missed targets, was lower by another 0.6% to $44.92.

Away from earnings, shares of

MGM Mirage

(MGM) - Get Report

slumped more than 7% after billionaire Kirk Kerkorian's Tracinda investment group ended talks to purchase the Bellagio Hotel & Casino and CityCenter properties in Las Vegas.

Instead, MGM said it will enter a joint venture project with real estate developer Kerzner International Holdings to construct a new resort on the Vegas Strip. MGM shed $5.90, or 6.8%, to $80.60.

Meanwhile, the Paris Air Show is ongoing and planemakers continue to collect new orders. Among them,

Boeing

(BA) - Get Report

signed a deal to sell 16 planes, worth $2.7 billion at list prices, to

Air France KLM

( AKH), and

Textron's

(TXT) - Get Report

Cessna unit signed a more than $1 billion pact to provide 96 jets to NetJets.

Airbus, Europe's rival to Boeing, has reportedly received a commitment from India's Kingfisher Airlines to acquire 50 planes, including the new A350 XWB, in a $7.3 billion agreement.

Elsewhere,

Wal-Mart

(WMT) - Get Report

plans to open 1,000 MoneyCenters, which will offer low-cost check cashing, money orders, bill payment and money transfers, in its stores by the end of next year. The company will also expand its financial products and services, starting with the Wal-Mart MoneyCard, a reloadable prepaid Visa.

Wal-Mart shares ended lower by 22 cents, or 0.5%, at $48.59.

As for research calls, Deutsche Bank downgraded

Occidental Petroleum

(OXY) - Get Report

to hold from buy, and UBS began coverage of

Under Armour

(UA) - Get Report

with a buy rating.

Energy prices fell in the wake of the Energy Department's weekly inventory report, which showed a greater-than-expected gain of 6.9 million barrels in crude inventories. Gasoline stocks rose 1.8 million barrels last week, and distillate stocks rose by only 100,000 barrels.

The front-month July contract dropped 91 cents to $68.19 a barrel, and gasoline was lower by a penny at $2.22 a gallon.

Precious metals were also weaker. Gold fell $4.70 to $660 an ounce, and silver was off 7.5 cents at $13.25 an ounce.

Global markets generally improved. Overnight, Tokyo's Nikkei increased 0.3%, and Hong Kong's Hang Seng was up 0.5%. London's FTSE was unchanged, while Frankfurt's DAX climbed 0.7%.