US stocks closed narrowly mixed Tuesday, amid major earnings reports and ahead of the week's central bank meetings. 
The Dow Jones industrial average closed 19.31 points lower, or 0.10%, at 18,473.75, with McDonald's leading decliners and Caterpillar the top advancer.
The S&P 500 closed 0.70 points higher, or 0.03%, at 2,169.18, with industrials and materials leading five sectors higher and telecommunications the greatest laggard. 
The Nasdaq composite closed 12.42 points higher, or 0.24%, at 5,110.05.