WORST WEEK OF YEAR: The Standard & Poor's 500 index ended a shortened trading week down 0.7 percent. That's the biggest fall for the index this year and the worst since the week ended Dec. 16, 2011. Stock trading will be closed for the Good Friday holiday.
PAIN IN SPAIN: Investors sold on fears that Spain may have trouble paying back its debt. On Thursday, the interest rate on a key Spanish government bond rose to its highest since November, raising the specter that the company could join Ireland, Portugal and Greece in asking for bailout.
DROP FOR DRINKS MAKER: Constellation Brands, a wine and spirits company, plunged 12.5 percent, the most in the S&P 500. The company's forecast for 2013 earnings was well below what analysts were expecting. Constellation's brands include Robert Mondavi wines and Corona Extra beer.