(Updates to midday, changes byline)
By Kevin Plumberg
NEW YORK, April 1 (Reuters) - U.S. stocks rallied on Tuesday, buoyed by bank stocks, which surged on strong demand for a Lehman Brothers Holdings Inc <LEH.N> share offering and a huge UBS writedown that signaled the worst was behind it.
Shares of Lehman jumped 11 percent on Tuesday after the bank said it raised $4 billion of capital after an offering of convertible preferred shares, bolstering its balance sheet and erasing fears that it was facing the same predicament as Bear Stearns <BSC.N>, which nearly collapsed two weeks ago.
The financial sector also benefited from news that Swiss investment bank UBS AG <UBSN.VX> wrote down an additional $19 billion on U.S. real estate and related assets, in addition to unveiling a massive increase in capital. U.S.-listed shares of UBS <UBS.N> surged 12.5 percent to $32.42 on speculation that the bank was wiping its slate clean.
"We're moving away from the credit crisis storm. It's dying down," said David Kelly, chief market strategist with JPMorgan Funds Management. "Now we just have whatever bad economic weather there is. That is much safer territory for Wall Street."
The Dow Jones industrial average <
> jumped 307.93 points, or 2.51 percent, to 12,570.82. The Standard & Poor's 500 Index <.SPX> gained 33.12 points, to 2.50 percent, at 1,355.82. The Nasdaq Composite Index < > advanced 59.87 points, or 2.63 percent, to 2,338.97.JPMorgan Chase <JPM.N>, up 6.7 percent at $45.83, contributed the most to the Dow's advance and was the second-biggest positive influence on the S&P 500 at midday.
Citigroup Inc <C.N>, up 9.1 percent at $23.36, and Bank of America Corp <BAC.N>, up 5.6 percent at $40.03, rounded out the top three stocks in the S&P.
"Financials are cheap right now, and if investors can get comfortable that they are near or at a bottom, they can start putting money to work in the sector." said Mark Schlarbaum, a trader at Global Capital Management in Conshohocken, Pennsylvania.
JPMorgan's Kelly added that the stock market's rally also was being driven by investors' relief that liquidity issues did not cause another Bear Stearns-style meltdown before the quarter end.
Widespread uncertainty in stock markets around the world led global equity and equity-related underwriting volume in the first quarter of 2008 to fall to $100.6 billion, the lowest level since the first quarter of 2003, according to Thomson Financial data.
Beside the banking sector, semiconductors gave the market more fuel for gains on Tuesday. The Philadelphia Stock Exchange semiconductor index <.SOXX> was up 3.8 percent. Among the best-performing shares were SanDisk Corp's <SNDK.O> stock, up nearly 10 percent at $24.75 on the Nasdaq.