(Adds S&P bank downgrades)
* Major U.S., European stock indexes fall more than 1 pct
* Yen rises, sterling down as risk aversion increases
* Credit jitters return, sparking bid for safe-haven bonds
By Herbert Lash
NEW YORK, June 2 (Reuters) - U.S. equity markets fell sharply on Monday after a UK mortgage lender's bleak outlook and a Standard & Poor's downgrade of three major U.S. banks revived credit jitters and sent investors scurrying to safer securities.
The yen rose broadly, posting its largest single-day gain against the dollar in nine weeks, while sterling fell as a warning from Bradford & Bingley <BB.L> reminded the markets about the lingering impact of the crisis on global economies.
Euro zone government bonds rose and yields retreated on a safe-haven bid and the yield on the benchmark U.S. 10-year government note slipped below 4 percent as investors favored bonds over stocks.
Oil rebounded from sharp initial declines to stand more than $1 higher at almost $129 a barrel as a rally in natural gas and refined oil products helped outweigh demand concerns and a firmer dollar.
The three major U.S. stock indexes and the main European share index all declined more than 1 percent. B&B shares fell 24 percent after the lender said it replaced its chief executive and slashed the price of emergency fund-raising to secure a lifeline from private equity firm TPG Capital.
TPG Capital agreed to take a 23 percent stake in B&B, which said it expects the British mortgage market to deteriorate.
"It's been maybe a bit of a wake-up call that the financial problems are not just all down to the U.S. subprime market and we can't insulate ourselves from that. It's been a bit of a slap around the face for investors," said IG Index chief markets strategist David Jones.
In early afternoon Standard & Poor's cut the ratings of Lehman Brothers Inc <LEH.N>, Merrill Lynch & Co Inc <MER.N> and Morgan Stanley <MS.N> and said the outlook on the large U.S. financial services sector are now mostly negative.
Lehman shares were hurt the most, falling 7.9 percent to $33.90. Morgan Stanley stock was down 3.7 percent to $42.60 and Merrill Lynch shares fell 4.9 percent to $41.78.
After 1 p.m., the Dow Jones industrial average <
> was down 180.67 points, or 1.43 percent, at 12,457.65. The S&P 500 Index <.SPX> was down 19.76 points, or 1.41 percent, at 1,380.62. The Nasdaq Composite Index < > was down 45.00 points, or 1.78 percent, at 2,477.66.In Europe, the FTSEurofirst 300 index <
> of top European shares fell 1.1 percent to close at 1,319.13 points.Wachovia Corp <WB.N> shares fell more than 4 percent after the bank announced the departure of its chief executive over what it termed "disappointments," including the purchase of a big mortgage lender at the height of the U.S. housing boom.
Financial stocks were among the worst-performing sectors.
Blue-chip banks JP Morgan Chase <JPM.N> fell 1.7 percent to $42.27 and Bank of America <BAC.N> was off 1.6 percent to $33.45. Wachovia fell to $22.79.
Adding to the gloom was a report from the Institute of Supply Management showing U.S. factory activity contracted in May for the fourth consecutive month, while prices paid by factories surged to their highest since April 2004.
"The negatives are that the economy is still in a contraction mode, as we've seen in the ISM today. The financial companies are still in trouble, as we saw with the removal of the head of Wachovia," said Joseph Battipaglia, market strategist at Stifel Nicolaus in Yardley, Pennsylvania.
"So the outlook for what kind of growth and profits we can have is quite uncertain."
The yen, which tends to get bid in times of heightened risk aversion as investors unwind trades financed by borrowing the Japanese currency at low interest rates, rose against the dollar.
The dollar fell against the yen <JPY=> 1.35 percent at 104.08, while the euro <EUR=> rose 0.15 percent at $1.5576.
Against a basket of major currencies, the U.S. Dollar Index <.DXY> fell 0.12 percent at 72.786.
The sour outlook from B&B renewed credit jitters and helped a bid for safe-haven bonds stage a tentative bounce back from a steep drop last week.
"It's a deserved correction. We had oversold last week and the news about Bradford and Bingley provided the excuse," said David Keeble, a bond strategist at Calyon in London.
The benchmark 10-year U.S. Treasury note <US10YT=RR> rose 27/32 to yield at 3.96 percent. The 30-year U.S. Treasury bond <US30YT=RR> rose 26/32 to yield at 4.67 percent.
A recovery in crude was led by gas, heating oil and gasoline, traders said.
U.S. light sweet crude oil <CLc1> rose $1.51 to $128.86.
U.S. gold futures climbed as buying in bullion increased as oil pared initial losses, boosting gold's appeal as a hedge against inflation.
Spot gold prices <XAU=> rose $10.05 to $895.95.
Japan's Nikkei share average <
> rose 0.7 percent for to its highest close since Jan. 9.Technology stocks boosted Taiwan's TAIEX index <
> 1.2 percent, while China Mobile <0941.HK> and CNOOC <0883.HK>, China's No. 3 oil producer, led Hong Kong's Hang Seng index < > up 1.3 percent, one of the region's largest gainers.The MSCI index of shares in the Asia-Pacific region outside Japan <.MIAPJ0000PUS> added 0.4 percet. (Reporting by Richard Leong, Gertrude Chavez-Dreyfuss and Frank Tang in New York and Amanda Cooper, Santosh Menon and Ian Chua in London) (Reporting by Herbert Lash. Editing by Richard Satran)