Key Points The S&P 500 is a venerated index of 500 big American companies. The top holdings, which include the "Magnificent Seven," make up much of its value. That can provide a tailwind -- or a headwind. 10 stocks we like better than Invesco S&P 500 Equal Weight ETF › A recent Motley Fool research report about the "Magnificent Seven" stocks raises some important and troubling points. Here's a look at its findings. First, though, some background: If you enjoy keeping up with growth stocks (and ...