US stocks ended slightly lower on Tuesday, reversing course late in the session as strength in the dollar offset optimism about deal news.
The S&P utilities sector, which helped lead gains on Monday, was the biggest drag on the S&P 500, closing down 1.1%.
The dollar recovered from recent losses, reaching session highs in afternoon trading. That shifted investor focus again to worries about its impact on US earnings.
"If the (dollar) move is gradual it shouldn't impact stocks too much, as companies will have a chance to hedge against the impact, but a sharp rise will have an impact," said Tony Roth, chief investment officer at Wilmington Trust in Wilmington, Delaware.
Stocks were in positive territory for most of the session, lifted by deal news that suggested companies still see value in the market.
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The Dow Jones industrial average fell 5.43 points, or 0.03%, to 17,875.42, the S&P 500 lost 4.29 points, or 0.21%, to 2,076.33 and the Nasdaq Composite dropped 7.08 points, or 0.14%, to 4,910.23.
While a strong US dollar is a sign of solid fundamentals, analysts are concerned that the currency will weigh on the earnings of US multinational companies. Bank of America Merrill Lynch on Tuesday cut its 2015 earnings estimates for the S&P 500 by $2 a share, citing the foreign exchange headwind.
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Other decliners included shares of Viacom
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Declining issues outnumbered advancing ones on the NYSE by 1,699 to 1,352, for a 1.26-to-1 ratio on the downside; on the Nasdaq, 1,457 issues fell and 1,267 advanced for a 1.15-to-1 ratio favouring decliners.
The benchmark S&P 500 index was posting 9 new 52-week highs and no new lows; the Nasdaq Composite was recording 68 new highs and 24 new lows.
About 5.7 billion shares changed hands on US exchanges, compared with the 6.3 billion daily average for the month to date, according to data from BATS Global Markets.

