Apple Inc. AAPL, +3.85% at Wednesday’s close retained its title as the most valuable U.S. company after Microsoft Corp. MSFT, +3.71% surpassed the iPhone maker in market cap for the first time in more than eight years. At mid-day, Microsoft was at a market capitalization of $846.73 billion versus Apple’s $846.53 billion but the tech giants spent Wednesday jockeying for position as the most valuable U.S. company by market cap. At the close, Apple shares finished up 3.9% at $180.94 for a market cap of $858.63 billion, while Microsoft shares closed up 3.7% at $111.12 for a cap of $852.98 billion. Apple surpassed Microsoft in market cap back on May 28, 2010, when both companies were worth about $226 billion, according to FactSet. For the year, Microsoft shares are up 29.9% while Apple shares are up 5%, compared with a 2.6% gain in the Dow Jones Industrial Average DJIA, +2.50% in which both stocks are components, a 2.6% gain in the S&P 500 index SPX, +2.30% and a 5.6% rise in the tech-heavy Nasdaq Composite Index COMP, +2.95%
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