U.S. stocks closed mixed Friday, dragged down by declines in financial and health care stocks.
"It's expiration so there's a lot of noise related to that," said Peter Boockvar, chief market analyst at The Lindsey Group.
Trade volume across the U.S. exchanges topped 9.4 billion, the most since Dec. 16.
The third Friday of every March, June, September, and December is quadruple "witching," the expiration of three related classes of options and futures contracts, along with individual stock futures options. Friday is also St. Patrick's Day.
The major averages closed higher for the week, with the Dow Jones industrial average holding a 0.06 percent weekly gain. The bulk of the week's gains came Wednesday after the Fed raised rates, as expected, but took a more dovish tone than expected.
"The interesting thing is a month ago nobody expected them to raise in March," Boockvar said. "The market's still in that 'everything is good mode.'"