Here come ADP private payrolls ...

ADP Research Institute will release its monthly report on US private-sector employment at 8:15 a.m. ET.

Economists estimate that private payrolls increased by 175,000 in December, according to Bloomberg.

ADP's recent payroll reports have shown a slowdown in the pace of jobs growth. That's likely because fewer people are searching for jobs, with the unemployment rate at an eight-year low and labor-force participation historically low.

This release comes ahead of the Bureau of Labor Statistics' nonfarm payrolls report on Friday, which is forecast to show private payrolls rose by 170,000 last month. That would extend the longest streak of private-sector job growth on record.

More to come ...