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			 In her second public speech since taking the Fed's helm, Yellen was 
			careful not to predict when interest rates would rise from near 
			zero. Instead, she stressed the decision would hinge on healing in 
			the labor market and on how briskly inflation rises toward the Fed's 
			2 percent goal. 
 			Yellen's relatively staid remarks to the Economic Club of New York 
			intensified somewhat when Martin Feldstein, a Harvard University 
			professor and former adviser to President Ronald Reagan, asked her 
			whether she would let inflation creep above 2 percent to give the 
			economy a bit more support.
 			"With inflation running at around 1 percent, at this point I think 
			the risk is greater that we should be worried about inflation 
			undershooting our goal and getting inflation back up to 2 percent," 
			Yellen said.
 			The central bank will "of course" eventually need to tighten policy 
			to avoid a run-up in inflation, she said. "Overshooting that goal 
			... can be very costly to reverse." 			
 
 			Yellen noted the Fed was not alone in its struggle to move inflation 
			higher as a buffer against an economically disabling deflation. The 
			European Central Bank is mulling unconventional policies that could 
			lift inflation in the euro zone, while Japan has been mired in 
			deflation for 15 years.
 			The Fed has kept its key rate near zero since the depths of the 
			financial crisis in late 2008, and has bought more than $3 trillion 
			in assets to help depress borrowing costs and stimulate economic 
			growth amid a frustratingly slow recovery.
 			While the central bank's preferred inflation gauge is just above 1 
			percent, a more popular measure firmed in March. Jobs growth was 
			also decent last month, but the unemployment rate stayed high at 6.7 
			percent as Americans returned to the labor market in droves to 
			search for work.
 			U.S. stocks added to gains on Yellen's remarks, which investors 
			viewed as underscoring the Fed's willingness to be patient in 
			nursing the economy back to full health.
 			"This concern about the persistent weakness in inflation provides 
			the key justification for the Fed to remain cautious about 
			tightening policy prematurely or too aggressively," said Millan 
			Mulraine, deputy chief economist at TD Securities. 
            VAGUE ROAD MAP FOR WALL STREET
 			An apparent pick up in the world's largest economy after a sluggish 
			winter has many investors attempting to predict when the Fed will 
			finally raise rates, with most eying mid-2015.
 			Yellen herself said it was "quite plausible" the economy would be 
			back to near full employment and a healthier level of inflation by 
			the end of 2016. 			"We are seeing very meaningful progress, although clearly ... the 
			goal has not been achieved at this point," she said. "We will be 
			very focused on removing accommodation when the right time has 
			come." 
            
            [to top of second column] | 
 
 			In the last few years, the Fed has tried an array of strategies to 
			telegraph just how long it will wait to tighten policy, including 
			tying the ultra-low rates to time periods, and later, to specific 
			unemployment and inflation thresholds.
 			Last month it rolled out its latest version of forward guidance, 
			effectively promising not to raise rates for a "considerable time" 
			after it halts its bond-buying program. But Yellen sowed more 
			confusion when she then told a news conference that a "considerable 
			time" means about "six months" or so, causing a selloff in stocks 
			and bonds.
 			Yellen did not mention the six-month term on Wednesday.
 			How long rates will stay near zero, she said, will depend on how far 
			the U.S. economy remains from the central bank's goals of 2 percent 
			inflation and maximum sustainable employment, and how long it will 
			likely take to meet them.
 			She repeated her view that there is likely more slack in the labor 
			market than suggested by the unemployment rate, which lessens the 
			risk of inflationary wage gains as the economy strengthens.
 			But she emphasized that unforeseeable events could alter the central 
			bank's current course, as it has several times since the economy 
			began recovering from the 2007-2009 recession. 			
			
			 
 			The Fed could even set aside efforts to wind down its bond-buying 
			stimulus if dealt an economic surprise, Yellen said. Financial 
			markets believe the Fed is nearly certain to end its purchases by 
			year end.
 			(Reporting by Jonathan Spicer; additional reporting by Ann Saphir 
			and Krista Hughes; editing by Chizu Nomiyama, Andrea Ricci and Chris 
			Reese) 
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