on my SPX index chart it shows volume increasing up until 2022.
however on SPY it shows volume falling ever since 2008. (recently SPY has had several monthly closes below 1B in total trading volume. last time a month closed below 1B in trade volume was 2004?)
also ES1! front month futures show a dropping volume since 2008 as well. (though not as severe as SPY)
anyway, i was just wondering why the index volume shows such a different story? where is that volume data from... random CFD charts??