While energy stocks fell with the price of oil, most other sectors did not make big moves.
Technology companies eked out a small gain.
The Dow Jones industrial average made its ninth straight gain.
They spent most of the day waiting for the minutes from the Federal Reserve meeting three weeks ago, but those minutes contained few surprises.
Gold prices rose 1.4% on the day, while silver was up 0.9%. The Standard & Poor's 500 index lost 3 points, or 0.1 percent, to 2,362.
Norwegian Air to offer $65 one-way trans-Atlantic fare
It carried 30 million passengers in 2016 and now has a fleet of 120 aircraft, most of which are new and highly fuel-efficient. Norwegian's chief executive, Bjorn Kjos, acknowledged that the new routes would not have been possible without Irish support.
The Nasdaq composite shed 5.32 points, or 0.1%, to 5,860.63.
Oil stocks were trading higher in advance of official inventory figures due later Thursday, with the super majors Chevron up 1.1 percent and Exxon Mobil gaining 0.7 percent.
More stocks fell than rose on the New York Stock Exchange.
All four indexes closed at record highs Tuesday.
At 9:33 a.m. ET, the Dow Jones Industrial Average was up 38.11 points, or 0.18 percent, at 20,813.71. Antitrust officials in the United States would still have to approve the deal.
China Blasts US Patrols In South China Sea
China's Foreign Ministry on Wednesday warned Washington against challenging its sovereignty in the South China Sea. Building them appeared to be more of a political test of how the Trump administration would respond, he said.
USA stocks are mainly modestly weaker after the release of minutes from the Federal Reserve's latest meeting showed numerous central bank's policymakers said it may be appropriate to raise interest rates again "fairly soon". Some Fed officials were anxious that if interest rates stay too low, the expanding economy could cause inflation to rise too fast. Since it was the first Fed meeting after Donald Trump was elected, investors are interested in the Fed's comments on the economic outlook.
"Our general view for a while has been that valuations are just high, but that doesn't mean the market has to go down immediately, it just means that longer-term returns may not be as robust", said Paul Nolte, portfolio manager at Kingsview Asset Management.
The Russell 2000 is up 37.49 points, or 2.8 percent. So far, the Nasdaq has only declined 10 times this year (including Thursday) and hasn't seen a 1% drop since December 1, 2016, representing 56 (including today) trading days.
ACTIVISTS STAY BUSY: Drugmaker Bristol-Myers Squibb rose 57 cents, or 1 percent, to $55.36 after the Wall Street Journal reported that billionaire investor Carl Icahn bought a stake in the company. He has not confirmed the investment.
ON THE REBOUND: Food and consumer products company Unilever rose after it said it will quickly review its options to find ways to raise value for shareholders.
Oscars 2017 Predictions: Will 'La La Land' Bag The Major Titles?
It now holds the record for the most Academy Awards won by a film that did not win the Best Picture Oscar . Ahead of the 89th Annual Academy Awards, YouTube released data related to this year's nominees.
Kraft Heinz shares were the top drag on the S&P, falling 3.7 percent after the company walked away from its $143 billion offer to buy Unilever, a day after the Anglo-Dutch company rejected the proposal. Unilever regained $2.06, or 4.6 percent, to $46.93 after a 7.5 percent skid Tuesday. Profits for S&P 500 companies are on track to rise 7.6 percent in the fourth quarter, the best quarterly growth since the third quarter of 2014, according to Thomson Reuters I/B/E/S. That has brought that index to its highest level since July 2000.