Here comes Markit services PMI ...

The May report on the services sector will cross at 9:45 a.m. ET.

Economists forecast that the US Services Purchasing Managers' Index from Markit Economics was unchanged from the previous month at 56.4, according to Bloomberg.

Additionally, ISM's non-manufacturing index is expected to come in at 57.0, down from 57.8 in the prior period.

In a morning note, Bank of America Merrill Lynch economists wrote: "The services sector of the economy continued to grow at a solid pace, contrasting with the recent weakness in manufacturing. As the economy recovers from the surprise decline in 1Q GDP, we think the nonmanufacturing index will likely remain near its current healthy trend, with potential for further acceleration."

We'll be back once the data drops ...