Shares of Apple were among the most actively traded stocks in Monday’s after-hours session, following an analyst’s upgrade ahead of its quarterly results, reports MarketWatch. Apple shares closed up 3.4% earlier after Piper Jaffray analyst Gene Munster said that he expects the computer maker to top Wall Street expectations for its fiscal third quarter, following his checks with Apple specialist stores and data from research group NPD (see previous report). When the iPod and Mac maker reports results Wednesday, analysts surveyed by Thomson First Call are expecting earnings of 44 cents a share on revenue of $4.4 billion.