NEW YORK (TheStreet) -- The S&P 500 fell back to the flatline Tuesday afternoon as lower crude oil prices pulled the energy sector lower. 

The S&P 500 was flat, hovering at records achieved on Monday. The Dow Jones Industrial Average gained 0.13%. The Nasdaq fell 0.12%.

The energy sector was under pressure as oil prices declined. Crude was lower as the U.S. dollar spiked on the promise of increased quantitative easing in Europe and as the domestic housing recovery picked up steam. West Texas Intermediate crude closed 3.7% lower to $57.26 a barrel.

Major oilers Chevron (CVX), Royal Dutch Shell (RDS.A), BP (BP) and Total (TOT) were all lower, while the Energy Select Sector SPDR ETF (XLE) fell 1.4%.

Medtronic (MDT) gained after issuing preliminary fourth-quarter results. The medical equipment developer said it expects profit at the upper half of its previous range of $1.08 to $1.13 a share. This marks the first quarter in which the results from its $43 billion acquisition of Covidien will be included.

Health care was the best-performing sector on the S&P 500. Pfizer (PFE), Johnson & Johnson (JNJ), Biogen (BIIB), and Merck (MRK) were all higher, while the Health Care SPDR ETF (XLB) climbed 0.5%.

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