The rose slightly on Wednesday, as the Federal Reserve reaffirmed that it would keep rates unchanged this year.

The Dow Jones industrial average pared small early gains, ending the day 7 points higher. Boeing shares weighed on the Dow, falling 1.1%, while Goldman Sachs rose 1.1%, leading the index. The S&P 500 finished the day up 0.4% while the Nasdaq composite ended 0.7% higher.

The Federal Reserve released the minutes of its March monetary policy meeting at 2 p.m. ET. Last month, the U.S. central bank decided to maintain interest rates and hold off an any further increases this year.

"A majority of participants expected that the evolution of the economic outlook and risks to the outlook would likely warrant leaving the target range unchanged for the remainder of the year," the minutes said.

The minutes revealed that Fed officials are leaving room for possible interest rate increase by the end of the year but currently do not expect to make any changes.

In regard to closely-watched trade negotiations, Treasury Secretary Steven Mnuchin told CNBC that the U.S. and China have "pretty much agreed on an enforcement mechanism" for when a deal is struck.

"We've agreed that both sides will establish enforcement offices that will deal with the ongoing matters," Mnuchin said.