The benchmark S&P 500 has surged 20 percent this year, the blue-chip Dow more than 25 percent and tech-heavy Nasdaq about 29 percent, setting them up for their best performances since 2013. The market has also shown surprising strength despite tensions in North Korea and political upheavals in Washington. The S&P has closed below 1 percent only four times this year.
"By all accounts 2017 has been a great year for the market," said Arian Vojdani, investment strategist at MV Financial in Bethesda, Maryland. "It is rich (in valuation) as of now and if prices and earnings continue to converge, I wouldn't be concerned."
Among sectors, the technology index has been the best performer, rising about 37 percent and outpacing gains in the broader S&P index. Telecom services and energy are the only two sectors to end the year in the red.
The rally is widely expected to extend into 2018, boosted by gains from a new law that lowers the tax burden on US corporations. At 12:19 pm ET (1719 GMT), the Dow Jones Industrial Average was down 14.16 points, or 0.06 percent, at 24,823.35 and the S&P 500 was down 1.79 points, or 0.06 percent, at 2,685.75.
The Nasdaq Composite was down 10.92 points, or 0.16 percent, at 6,939.24. Apple declined 0.52 percent after issuing a rare apology for slowing older iPhones with flagging batteries. Goldman Sachs lost 0.5 percent after saying its fourth-quarter profit would take a $5 billion hit related to the new tax law.
Copyright Reuters, 2017