By Anora Mahmudova, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks moved decisively lower by mid-afternoon on Monday after Atlanta Federal Reserve president Dennis Lockhart said he supported "similar tapering steps" in spite of disappointing jobs figures.

The Dow Jones Industrial Average (DJI) dropped 109.7 points, or 0.7% to 16,328.45. The S&P 500 index (SPX) fell 12.9 points, or 0.7% to 1,829.44. The Nasdaq Composite (RIXF) lost 27.33 or 0.7% to 4,147.49.

In a speech to the Rotary Club of America, Atlanta Fed president Lockhart said he supports "similar tapering steps" as the one taken to reduce bond-market purchases by $10 billion by the Federal Reserve last month, so long as the economy grows at the 2.5% to 3% clip he's forecasting this year.

He pointed out that the labor market is not as healthy as a 6.7% unemployment rate suggests as he also said continued disinflation could pose risks to economic performance. Follow stock market live blog here.

On Friday, the government reported that the U.S. economy added 74,000 jobs in December, the smallest gain in three years and well below economists' forecast of about 200,000. The unemployment rate fell to 6.7%, however, largely due a large number of people dropping out of the labor force. Investors were undecided whether this should be taken as a negative or positive for markets, as stocks fluctuated in an narrow range on Friday, closing mostly higher.

In separate news, the federal government recorded a budget surplus of $53 billion in December, the Treasury Department reported Monday. Nearly $40 billion in payments from government-controlled mortgage giants Fannie Mae and Freddie Mac helped the surplus, the largest on record for the month of December. The surplus brings the government's budget deficit for the first quarter of fiscal 2014 to $174 billion, 41% lower than the first three months of fiscal 2013.

This week, investors will also focus on retail sales and inflation data as well as earnings reports from large banks such as J.P. Morgan Chase & Co. (JPM) and Goldman Sachs Group Inc. (GS)Read: Retail data, Beige Book in view after weak jobs futures

In a research note from David Kostin at Goldman Sachs, wrote that the S&P 500 valuation is looking "lofty by almost any measure."

Randy Frederick, a managing director for active trading and derivatives at Charles Schwab believes that valuations are slightly above the fair value point, but not enough to be concerned.

"We look at 12-months trailing PE ratios rather than forward-looking ones, and at roughly 19.5 that number, while slightly higher than historical average, seems not terribly high. Even if earnings do not rise as much as we expect, there is still room for a slight PE expansion."

He also expects that December jobs figures will be revised upwards.

"Markets believe that the December jobs data were disappointing primarily due to cold weather and investors think the number is likely to be revised upwards. Given all other indications suggesting improving hiring conditions, such as ADP and manufacturing data, the number of new jobs will be made up in the next month," Frederick said.

* Comment: Nicholas Colas, chief market strategist at ConvergEx Group, a global brokerage company based in New York, wrote in a note: "The most disappointing number from Friday's Employment Report was not the miss to jobs growth expectations (74,000 versus the hoped for 200,000), but rather the continued precipitous decline in labor force participation. At 62.8%, this measure of people actually working or looking for employment has slumped back to the levels of the 1970s economic malaise. More importantly, the trend here has outstripped the U.S. Government's forecasts, which only called for such a level around 2020. January 2013 may not see any improvement if Congress does not extend emergency unemployment benefits, with participation dropping further if the long-term unemployed chose to exit the workforce as a result. That would leave the Fed with an unwelcomed communications problem: quickly drop the 6.5% threshold unemployment rate from its monetary policy, or risk being seen as out of touch."

* Movers and shakers: Beam Inc. shares surged 24% on news that it will be acquired by Suntory Beverage Food Ltd. in a $16 billion deal, including debt. Shares of Alnylam Pharmaceuticals Inc. soared 40% on news Sanofi SA will buy a 12% stake in the company to strengthen its new drug pipeline. The two firms will extend research collaboration to develop and sell new drugs aimed at treating rare genetic disorders. Shares in Apple Inc, rose 1%, boosting the S&P 500 technology sector. Shares of Twitter Inc. rose 3.2% after Goldman Sachs lifted its price target for the social media network to $65 from $46 and maintained a buy rating. Wendy's Co.shares rose 6.5%, as the fast-food company's expected adjusted earnings per share were higher than analysts expected. Wendy's also said its board had authorized a stock buyback program of $275 million. Shares of Lululemon Athletica Inc. dropped 16.33% after the company cut its profit view.

* In other markets:European and Asian stocks rose on Monday. Gold and oil prices were lower, while the dollar pushed higher.

More stories from MarketWatch:

Stock investors get ready for big bank earnings

Retail data, Beige Book in view after weak jobs figures

Banks, hedge funds and what Citi has to tell its rich clients

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