Major U.S. stock-indexes fell on Tuesday amid broad declines across sectors after Alcoa kicked off the earnings season on a disappointing note. Alcoa's (AA) shares fell nearly 11%, their worst day in five years after the aluminum producer reported quarterly revenue and profit that fell short of the market's expectation.

Most of Dow stocks in negative area (28 of 30). Top gainer - Apple Inc. (AAPL, +1.10%). Top loser - Merck & Co., Inc. (MRK, -2.25%).

All S&P sectors also in negative area. Top loser - Healthcare (-1.9%).

At the moment:

Dow 18068.00 -191.00 -1.05%

S&P 500 2135.25 -23.75 -1.10%

Nasdaq 100 4834.50 -58.75 -1.20%

Oil 50.52 -0.83 -1.62%

Gold 1258.80 -1.60 -0.13%

U.S. 10yr 1.75 +0.02