$100 put into S&P 500 in 1975 would be about $7500 today, or about $1250 in 1975 dollars.
$100 put into gold in 1975 would be about $2600 today, or about $440 in 1975 dollars.
S&P 500 would have had 3x the returns of gold.
check your numbers with a purchase date of 1971.
check your numbers with a purchase date of 1971.