Market losses, low yields sideswipe U.S. corporate pensions

By Gertrude Chavez-Dreyfuss and Richard Leong NEW YORK (Reuters) - Low interest rates and a U.S. stock market that is still down 2 percent for the year have taken their toll on corporate America's pension plans. Pension liabilities grew 1 percent in the third quarter, as returns fell 2.5 percent, according to global consulting firm Milliman. The increase in the pension shortfall has been largely driven by investment losses in August and September, low discount rates used to value pension liabili