Here comes Chicago PMI ...

The latest Chicago Purchasing Manager's Index from the Institute of Supply Management will cross at 9:45 a.m. ET.

Economists forecast that the index rose to 53 in May, according to Bloomberg.

The index rose to 52.3 in April from 46.3 in March. That beat the expectation for a reading of 50, the midpoint between contraction and expansion.

Last month's reading was the first time in three months that the index showed an expansion in business activity in the Midwest.

We'll be back when the number hits...