The headline read, "Do We Blame Crude Oil or Yellen?" referencing what might explain today's big 158 point drop in the Dow since crude did drop some more and Yellen did have some heavy oratory about how well the economy is doing, thereby leaving little doubt that there will be an interest hike in two weeks.  Actually, they were both wrong.  (Curiously an earlier headline had read something to the effect "Yellen gives no hint as to rate hike."  The media just didn't get much right today.)  After close, a third much more plausible explanation emerged as it was observed that the dramatic dive in the Dow started just about 1 p.m., about the time news was coming in about the shooting spree in California.  Why a crime 3,000 miles away would cause a panic on Wall Street is anyone's best guess ... but that's what they're saying.  More good news about private hiring likely also contributed to the sell off on fears of the rate hike.  It's going to be an interesting rest of the week.  Tomorrow Yellen gives the Congress her take on the economy and Friday is the much anticipated November federal jobs report.  If both of these are positive, that will lend ever more credence to a hike.  But we're still 14 days away from the December Fed meeting.  Trading was quite healthy at 7.4 billion shares.

Markets | Wed Dec 2, 2015 6:01pm EST

Wall St. ends sharply lower; energy leads decline

BY CAROLINE VALETKEVITCH

DJ:  17,729.68  -158.67      NAS:  5,123.22  -33.08        S&P: 2,079.51  -23.12

(Reuters)  U.S. stocks closed sharply lower on Wednesday after hawkish comments from Janet Yellen boosted expectations of an interest rate hike, and oil dipped below $40 a barrel. Investors also attributed late-day selling to news coverage of a shooting in southern California.

The S&P 500 energy index .SPNY fell 3.1 percent, leading declines in the S&P 500 as U.S. crude oil futures finished the session down 4.6 percent at $39.94. The utility index .SPLRCU, which tends to underperform in a higher-rate environment, dropped 2.2 percent. It was the day's second-worst performing sector, although all 10 S&P sectors ended lower.

Record intraday highs in Alphabet, Amazon and Netflix failed to keep the Nasdaq in positive territory.

The Fed chair said she was "looking forward" to a rate hike that will be seen as a testament to the economy's recovery from recession. The Fed's next policy meeting is Dec 15-16.

Yellen also expressed confidence in the U.S. economy. Earlier in the day, data showed U.S. private employers boosted hiring in November. The U.S. government monthly jobs report is due Friday.

"I was a little surprised she sounded as hawkish as she did given we're two days away from the non-farm payrolls report and a couple of weeks away from the Fed FOMC meeting," said Michael O’Rourke, chief market strategist at JonesTrading in Greenwich, Connecticut.

The Dow Jones industrial average .DJI fell 158.67 points, or 0.89 percent, to 17,729.68, the S&P 500 .SPX lost 23.12 points, or 1.1 percent, to 2,079.51 and the Nasdaq Composite.IXIC dropped 33.08 points, or 0.64 percent, to 5,123.22.

Losses accelerated late in the session as news of a shooting in California emerged. Police searched for up to three suspects in the shooting of as many as 20 people, some of them fatally, at a social services agency in San Bernardino.

"This last down leg is related to the fact that every TV station in America is showing people getting carted off on stretchers, and no one knows why," said Eric Kuby, chief investment officer of North Star Investment Management Corp, in Chicago.

Yahoo (YHOO.O) jumped 5.8 percent to $35.65 after reports the company could sell its core Internet business.

Shares of Amazon (AMZN.O) touched a record high of $684.82 before ending down 0.4 percent at $676.01. Netflix (NFLX.O) rose to a high of $131.35 and ended at $128.93, up 2.8 percent. Alphabet (GOOGL.O) rose to $793.04, but ended down 0.8 percent at $777.85.

Airline shares rose after Delta Air Lines Inc (DAL.N) said it earned more per mile in November than a year ago. Delta was up 1.4 percent at $48.33, while an index of airlines.XAL was up 1.1 percent.

Yellen is due to testify on the economic outlook before a joint Congressional committee on Thursday.

Declining issues outnumbered advancing ones on the NYSE by 2,434 to 649, while on the Nasdaq, 1,884 issues fell and 936 advanced. The S&P 500 posted 21 new 52-week highs and 13 new lows; the Nasdaq recorded 88 new highs and 65 new lows.

About 7.4 billion shares changed hands on U.S. exchanges, above the 6.8 billion daily average for the past 20 trading days, according to Thomson Reuters data.