The majority of my money in the market is in index funds – 60% or so, trying to make it 80%. The remainder is put into companies of my choosing. For this 20%, I’m using robinhood, and there are no commisison fees, so I wonder, is there any particular “max” number of companies? Conceivably I could put my money into several dozen companies instead of more heavily into a small number. Is there any downside to this (besides the fact that the stocks obviously won’t all be winners)?

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