re: Give me three stocks you’re buying right now. No day trading.

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The Justice Department breaking them up?

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I think this could end up becoming the case, but not with respect to the entire companies. Rather, antitrust regulators may look at specific segments in which they operate to determine whether there is too much concentration. If you consider, for instance, based on this link that Amazon has 49% of the ecommerce market, followed by eBay at 6.6%, Apple at 3.9% and Walmart at 3.7%, it's likely that the ecommerce market already has a Herfindahl-Hirschman Index in excess of 2500, which is a threshold regulators look to in determining excessive concentration. If I assume that in addition to the 4 aforementioned companies there are 46 other ecommerce companies in the Top 50 each having 0.8% share of the market, I get to an HHI of 2503. If Amazon's share were to jump from 49% to 55%, the next 3 stayed flat, and the bottom 46 dropped to 0.67% each, the HHI would jump to 3118.

Also, just because: