Most people, who try to time these, usually get it completely wrong and end up losing huge amounts of money. I just stay invested in the indexes and some long term stocks, every time I try to predict something it goes badly.
Bear in mind that your index becomes more and more of those six or seven companies, the more they grow. I think they're over 30% of the market? So an index tracker is still greatly exposed to this.
> The index aims to provide a comprehensive and balanced representation of the U.S. equity market by including the largest 500 publicly traded equity securities, while specifically excluding the seven largest technology companies commonly referred to as the “Magnificent 7”.
Up 12% in the last year. Unfortunately, it's ten times as expensive (0.35%) as a straight S&P 500 ETF (e.g. VOO, 0.03%).