U.S. stock futures leaned lower Friday on concern over possible export restrictions on Nvidia, ahead of key data on the jobs market. Dow Jones Industrial Average futures fell 41 points, or 0.1%, to 42837. S&P 500 futures dropped 17 points, or 0.3%, to 5942.

Surging bond yields have pulled the Nasdaq into negative territory for the month heading into today's December jobs report.

Stock index futures reversed course and turned red on Friday, as investors braced for the key December jobs report.  S&P 500 futures (SPX) -0.1%, Nasdaq 100 futures (US100:IND) -0.1% and Dow futures (INDU) -0.

The S&P 500's return since Election Day has fallen to just around 0.5%. If that holds through Inauguration Day on Jan. 20, it will mark the worst performance for the broad index between an election and inauguration since Barack Obama came into the White House in 2009.

Here's what to know about whether U.S. stock markets will be open on the national day of mourning on Thursday, Jan. 9.

So much for a rerun of the 2016 post-election U.S. stock market rally. The S&P 500 index is clinging to a gain of just 0.8% since Election Day on Nov. 5, threatening to erase the “Trump bump” investors attributed to Donald Trump’s victory.