Trouble with Concentrationمشكلة مع التركيز

You've all read about the surging concentration of fewer stocks (Magnificent 5) controlling the latest record breaking rallies in indices. This reminds me of exactly 4 years ago today, when the FAANGs were making up over 40% of the rally, especially during that late upward thrust from October 2019 to the peak of February 2020.  The current rally also reminds me when I started shorting SPX in Nov 2019 and held on thru the selloff of late Jan 2020. The profits were short-lived as the market rebounded to hit a new high into 19th of Feb 2020, forcing me out of the position before ... markets collapsed on Covid-19.

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