Tuesday:

• At 8:30 AM ET, the Consumer Price Index for March. The consensus is for a 0.1% increase in CPI in February and for core CPI to increase 0.1%.

• Also at 10:00 AM, the NY Fed Empire State Manufacturing Survey for April. The consensus is for a reading of 7.5, up from 5.6 in March (above zero is expansion).

• At 8:45 AM, Speech by Fed Chair Janet Yellen, Opening Remarks, At the Federal Reserve Bank of Atlanta Conference: 2014 Financial Markets Conference, Stone Mountain, Georgia.

• At 10:00 AM, the April NAHB homebuilder survey. The consensus is for a reading of 50, up from 47 in March. Any number above 50 indicates that more builders view sales conditions as good than poor.