U.S. Markets: The major U.S. indexes closed moderately higher in a shortened trading week.  Energy shares performed best within the S&P 500 Index as oil prices reached their highest level in two years. The Dow Jones Industrial Average added 227 points to finish the week at 34,756 - a gain of 0.7%.  The technology-heavy NASDAQ Composite rose 0.5% to 13,814. By market cap, the large cap S&P [...]