ADP's payroll report, the warm-up act for Friday's jobs data, could drive market direction more than usual Wednesday.

One reason is that the payroll-services provider's 8:15 a.m. data come ahead of the auction of $21 billion in reopened 10-year notes, 1 p.m. ET, and stronger-than-expected data could help yields rise, giving a concession to the market. Though not viewed as a true picture of the jobs report, the data have become more trusted among market players recently.