Our readingWhat is a korrent?
Because stock returns are concentrated in a few winners that are very hard to know in advance, owning the whole index guarantees owning whichever ones turn out to be the drivers.
Drawn from what Morgan Housel said
What these subjects mean
stock market Equities as a whole: what returns have been, whether prices carry information, and what attention does to them.
investing Putting money into markets on purpose: what a portfolio is for, whether active management earns its cost, and what money is actually a means to.