Stock futures point to a lower open as investors kept an eye on Treasury yields as President Donald Trump's tax bill continues to travel through Congress. After the House narrowly passed by one vote its version of the One,

U.S. bond yields reached their highest level in 19 months before easing on Thursday, with worries lingering over the U.S. fiscal outlook and demand for government debt, while stocks on Wall Street ended flat to slightly higher.

Continued worries about the U.S. fiscal outlook triggered another selloff in long-dated U.S. government debt as of Wednesday morning, pushing the yield on the 30-year bond back above 5% for the second time this week in what turned out to be a problematic development for stocks.