> Etrade isn't going to let me buy fractional shares of stock in 1999 in proportion to the market cap.
I think you should go check the absolute $ cost of those stocks in 1999. The fractional share thing is an outcrop of just how well all these companies did in the period we are discussing
>And have you considered Etrade was probably charging 6 dollars per trade? $2,292 dollars in expenses to own 382 companies means I've lost before I began.
Again, of that $10k, $1k of it was Amazon and that's now worth $56k. Let's instead assume that you in practice bought $994 of Amazon. That is now $55,650. Literally start in a $9,006 hole - only buy Amazon with a fee and literally burn the rest of the cash - you're still at an 8% market-beating IRR.
I don't know why you are choosing to die on this hill of focusing on how much it would cost to accumulate the long tail, when it's the primarily the big ones that make the money anyway.
>It's not really a strategy so much as a data mining exercise.
In 2023 it's a data mining exercise. In 1999, it was a strategy. That's how time works.
>It doesn't even seem to have resulted in a lesson you can apply today, you earlier said you don't even know if Nvidia is a good buy.
I'm telling you the lesson - don't invest in weird penny stocks or picks and shovels, invest in innovative companies that are driving use-cases forward. If you are having trouble finding those companies through proprietary research, the market is actually already pretty good at selecting them for you (though you still want to index to an extent).
You don't have to take that advice but you should (because, again, keep in mind we are talking about buying at the peak, nearly any other entry point 2-3x'es these IRRs).