Wall Street's main indexes opened mixed Friday, a day after the S&P 500 closed at a record high, as investors assessed retail sales data and monitored the latest developments in the Middle East. At the open, the Dow Jones Industrial Average was up 2.8 points, or 0.01%, at 53,842.8, the S&P 500 rose 7.6 points, or 0.10%, to 7,806.6, and the Nasdaq Composite gained 48.1 points, or 0.18%, to 26,851.148. The move followed a strong prior session that lifted the benchmark S&P 500 to a fresh closing high.