If you're invested broadly in the S&P, so long as companies are "properly" valued, it is okay if INTC falls and AMD rises. If a major player is massively overv

If you're invested broadly in the S&P, so long as companies are "properly" valued, it is okay if INTC falls and AMD rises. If a major player is massively overvalued, though, then index funds, too, will feel some pain as the exuberance in a major player dissipates. I hold some INTC directly after having been extremely impressed with the company's dedication to rigorous process in engineering interviews in the mid-2010s. I'm sad to see such a great company go through hard times.