Dec 17 (Reuters) - Wall Street's main indexes opened

lower on Tuesday, as investors grew cautious ahead of the

Federal Reserve's interest rate decision later this week

following strong retail sales data that pointed to consumers'

continued resilience.

The Dow Jones Industrial Average fell 61.0 points, or

0.14%, at the open to 43,656.47. The S&P 500 fell 21.5

points, or 0.35%, to 6,052.55​, while the Nasdaq Composite

dropped 78.3 points, or 0.39%, to 20,095.618.