Because the SP500 is a better indicator of the market than USD. Also if you look at the global dollar index, it is right at par historically.
The companies in the 500 are mostly global companies, if the USD shrunk so much they would either be losing money, or it doesn't matter because the US market is so strong it dwarfs the others.
> The companies in the 500 are mostly global companies
Isn't that saying exactly what the parent comment mentioned? Since those companies are global, the growth of the S&P 500 which is USD denominated will track the devaluation of the USD as the underlying companies haven't lost value, the dollar has, and the S&P 500 would track that as growth in percentage to balance it.
I don't understand why they would be losing money since as you said they're global, and more untethered to the USD than the S&P 500.
This is clearly the USD Global index dropping a few basis points, which is an active strategy. Look at the USD Index over 15 year period, there is nothing wrong with USD today.
I'm not arguing if the S&P is a better indicator of the US economy than USD or not.
What I'm asking, to me it seems if the USD drops in value, but everything else stays the same (i.e. GOOG hasn't lost any real value if measured in any other currency for instance). I'd expect GOOG to rise in USD terms (as its value has stayed constant).
Why wouldn't this be true (yes, there are a bunch of assumptions/complexities, and perhaps those assumptions/complexities break the argument), but at a very simplistic level is what I said wrong?
The companies in the 500 are mostly global companies, if the USD shrunk so much they would either be losing money, or it doesn't matter because the US market is so strong it dwarfs the others.