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The largest 9 stocks now make up almost 40% of the weighting of the S&P 500 Index
Posted on 7/2/25 at 11:17 am
Posted on 7/2/25 at 11:17 am
As of this morning the "Mega 9" mega market cap stocks (NVDA, MSFT, APPL, AMZN, GOOG, META, AVGO (Broadcom), BRK.B and TSLA) are weighted at 38% in determining the performance of the S&P 500 Index.
The other 496 stocks (for some reason there are currently 505 stocks in SPX) are weighted at 62% of the index.
NVDA by itself has almost 7% weighting.
Since the SPX is market cap weighted, only 9 stocks have a heavy influence in determining what the SPX does each day.
The other 496 stocks (for some reason there are currently 505 stocks in SPX) are weighted at 62% of the index.
NVDA by itself has almost 7% weighting.
Since the SPX is market cap weighted, only 9 stocks have a heavy influence in determining what the SPX does each day.
5
Posted on 7/2/25 at 11:20 am to LSURussian
What is the unweighted performance?
Never mind looked it up
YTD
SPY - 4.21%
RSP - 2.93%
SPX - 5.69%
SPXEW - 4.87%
So a 40% weighting is creating a 16.83% difference. No idea if my mathing is correct
Never mind looked it up
YTD
SPY - 4.21%
RSP - 2.93%
SPX - 5.69%
SPXEW - 4.87%
So a 40% weighting is creating a 16.83% difference. No idea if my mathing is correct
This post was edited on 7/2/25 at 11:31 am
Posted on 7/2/25 at 11:30 am to LSURussian
Thanks for posting this. That changes my mind about investing in other tech outside of the S&P indexes I use
Posted on 7/2/25 at 11:33 am to LSURussian
im up 36% ytd. thank you trump 
Posted on 7/2/25 at 12:22 pm to Nonetheless
quote:
im up 36% ytd. thank you trump
watch it plenty haters here.
Posted on 7/2/25 at 1:06 pm to Fat Bastard
If you count AAPL and BRK.B are you double counting?
Posted on 7/2/25 at 1:06 pm to LSURussian
Seen this movie before but it was 50 not 9 names
Posted on 7/2/25 at 1:47 pm to LSURussian
They make up approximately 15-20% or S&P 500 earnings, but they’ve driven 60-70% of earnings growth over the last year.
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