A look at highlights from the day's business news:
Dow at 7-month lows
Stocks slumped Monday, with the Dow and S&P 500 ending at seven-month lows after the euro hit a fresh four-year low, adding to worries about the global economy.
The Dow Jones industrial average lost 115 points, or 1.2 percent, closing at the lowest point since Nov. 4.
The S&P 500 index lost 14 points, or 1.4 percent, and closed at its lowest point since Nov. 4. The Nasdaq composite fell 45 points, or 2 percent, and closed at its lowest point since Feb. 11.
Stocks seesawed through the morning before turning resoundingly lower in the afternoon. News that BP is capturing some of the flow of the oil leak in the Gulf of Mexico seemed to lift stocks early in the day. But any enthusiasm disappeared as the session wore on.
Euro keeps falling below $1.20
The euro kept falling against the dollar Monday, after plummeting below $1.20 and posting fresh four-year lows late last week.
In global trading Monday, the euro slipped as much as 0.8 percent against the dollar to $1.1877 but then pared back some of those losses to trade around 0.2% lower against the greenback in the afternoon.
Europe's shared currency closed below $1.20 for the first time in four years on Friday, after bleak economic statements out of Hungary and disappointing economic reports in the United States stoked fears about a global recovery.
Recent losses have put the euro near $1.18, where it traded when it debuted as a currency on Jan. 4, 1999.
Meanwhile, the dollar fell about 0.2 percent against the British pound to $1.448 and was flat against the Japanese yen at ¥91.88.
Oil falls along with global markets
Oil prices dropped Monday in tandem with global stock markets, extending deep losses sustained late last week.
Crude oil for July delivery fell 7 cents to settle at $71.44 a barrel. Crude prices are down more than 10 percent year-to-date, and have fallen 5.5 percent in the past month alone.
The national average price for a gallon of regular unleaded gasoline fell to $2.724, down from the previous day's price of $2.727, according to motorist group AAA.
Oil prices fell more than 4 percent Friday after a U.S. government report said almost all of the jobs added last month were temporary Census workers. That fueled worries about when domestic demand will rebound, since America is the world's largest consumer of oil.
Treasurys rise as stocks slump
Treasury prices rose Monday in choppy trading as stocks plummeted and investors braced for $70 billion in debt sales.
The benchmark 10-year note added 16/32 to 103, pushing the yield down to 3.15 percent on Thursday from 3.21 percent on Friday. Bond prices and yields move in opposite directions.
The 30-year bond climbed 29/32 to 105-3/32, yielding 4.08 percent. The five-year note rose 8/32 to 100-29/32 and yielded 1.9 percent, while the two-year note edged up less than 1/32 to 100-2/32, yielding 0.73 percent.
Treasurys seesawed Monday, ending with gains as stocks fell to 7-month lows and the euro plunged to a fresh four-year low against the dollar. U.S. government-backed Treasurys are viewed as low-risk investments and are attractive during times of economic uncertainty.
The government will sell a total of $70 billion in bonds and notes during the week, with the first $36 billion auction of three-year notes scheduled for Tuesday.
CNNMoney.com reporters Alexandra Twin, Annalyn Censky, Julianne Pepitone, Chavon Sutton and Blake Ellis contributed to this report.