Stock A has 10 million shares outstanding and stock B has 5 million shares outstanding. Both stocks sell for $10 a share. What is their relative weighting if both stocks are represented in the S&P 500?
B has twice the weighting, to account for having fewer shares.
They are weighted according to their expected performance.
A has twice the weighting, to account for having more shares.
They have equal weighting, like all S&P 500 stocks.