ALL EYES ON JOBS: Payroll processor ADP reported that U.S. businesses added far fewer jobs in April than they did in March. Investors will be watching on Friday for the government's own data on April jobs, which can vary from the ADP numbers.
GOOD NEWS, BAD NEWS: The 17 countries that use the Eurozone reported that unemployment rose to 10.9 percent in March, the highest since the euro launched in 1999. But Standard & Poor's lifted Greece's credit rating out of default.
THE CHESAPEAKE QUAGMIRE: Chesapeake Energy's stock plunged 15 percent. The company reported a quarterly loss late Tuesday and is also under fire for big pay packages for its CEO.