Charting a test of four-year highs By: MarketWatch August 21, 2012 at 12:28 PM EDT The major U.S. benchmarks are challenging four-year highs with this week’s upturn. Read More >> Related Stocks: Dr. Pepper Snapple Group Expedia Gulfport Energy Corp Hewlett-Packard SPDR S&P 500 ETF Trust Transportation Average Ishares ETF