This was the fifth straight quarterly rise for both the S&P 500 and
the Nasdaq, though it was the smallest three-month advance for both
since the fourth quarter of 2012. Both the Dow and the S&P 500 rose
for a second straight month in March.
Gains were broad, with nine of the S&P 500's 10 sector indexes
rising for the day. About 73 percent of stocks traded on both the
New York Stock Exchange and the Nasdaq closed higher.
The S&P materials sector index <.SPSMCM> was the best performer,
jumping 2.1 percent, while the S&P utility sector index <.SPSMCU>
advanced 1.3 percent.
Technology and financial shares, which along with materials are tied
to the pace of economic growth, also outperformed for the day.
Micron Tech <MU.O> climbed 8 percent to $23.66, ranking as the S&P
500's top percentage gainer. Oracle Corp <ORCL.N> rose 3.4 percent
to end at $40.91.
In her first public speech since becoming Fed chair two months ago,
Yellen said that the U.S. central bank's "extraordinary" commitment
to boosting the economy would be needed for some time to come.
Earlier this month, Yellen raised concerns by saying that the period
between the end of the Fed's quantitative easing program and the
first rate increase from the central bank could be six months, a
faster timeline than many had anticipated.
"What Yellen did today was to alleviate that confusion and provide
more clarity. When there aren't concerns about the Fed tightening,
the market can breathe easier," said Joseph Tanious, global market
strategist at J.P. Morgan Asset Management in New York.
Equities also received a boost from end-of-quarter "window
dressing," when money managers adjust positions to improve the look
of their portfolios.
Biotech stocks stayed in focus following recent volatility when
investors sharply took profits in the high-flying sector. The Nasdaq
Biotechnology index <.NBI> jumped 3 percent, following a 7 percent
drop last week, in what was the index's fifth consecutive weekly
decline.
Among some of the more active names, Vertex Pharmaceuticals <VRTX.O>
climbed 4.3 percent to end at $70.72 and Biogen Idec <BIIB.O> added
4 percent to close at $305.87.
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The Dow Jones industrial average <.DJI> shot up 134.60 points, or
0.82 percent, to end at 16,457.66. The Standard & Poor's 500 Index
<.SPX> gained 14.72 points, or 0.79 percent, to close at 1,872.34.
The Nasdaq Composite Index <.IXIC> climbed 43.24 points, or 1.04
percent, to finish at 4,198.99.
The S&P 500 rose 0.7 percent in March and gained 1.3 percent in the
first quarter. The Dow rose 0.8 percent for the month, but fell 0.7
percent in the quarter. The Nasdaq fell 2.5 percent for March, but
rose 0.5 percent in the quarter.
The Institute for Supply Management-Chicago business barometer was
at 55.9 in March, its lowest level since August, and down from 59.8
in February. Economists' median forecast in a Reuters poll was 59.0.
U.S.-listed shares of Prana Biotechnology Ltd <PRAN.O> plunged 71.6
percent to close at $2.80 after the company said its experimental
drug to treat Alzheimer's disease failed to meet the main goal of a
mid-stage study in patients with a mild form of the condition.
Logistics company UTi Worldwide Inc <UTIW.O> reported a
bigger-than-expected quarterly loss, hurt by weak demand for air
freight as customers opted for cheaper modes of shipping. Shares
slumped 6 percent to close at $10.59.
About 5.28 billion shares traded on all U.S. platforms, according to
BATS exchange data, below the 6.9 billion average so far this month,
according to data from BATS Global Markets.
(Editing by Bernadette Baum, Nick Zieminski and Jan Paschal)
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