The stock market is taking a breather after a 20% run higher this year. According to Fidelity, that was mostly driven by tech stocks, which are up 25% year-to-date.Dig a little deep, though, and we see the S&P 500 is once again mostly driven up by the same forces that allowed the index to gain 24% last year: the Magnificent Seven stocks.Six of the seven companies are tech stocks, and the definition could be stretched enough to include Tesla (NASDAQ:TSLA). They were responsible for almost all of the index’s ...