Today is the expiry day, so expect heavy volume. Two things happened today: the so-called triple voodoo, the quarterly expiry of stocks, index options and index futures, and the quarterly S&P 500 rebalancing, adding or subtracting to the S&P. The impact of triple witchcraft has been greatly reduced, as the huge increase in weekly and monthly options has become a fierce competition for quarterly expiry. The S&P rebalancing would see Palo Alto Networks enter the S&P 500 and Dish Network downgrade to a small S&P 600. This was announced on June 2, and as usual, Palo Alto has gained 12% since then. Dish has fallen 0.6%. This is also the day that index funds — such as the S&P 500 index funds run by Vanguard, State Street, iShares, etc. — have to rebalance because many companies have bought back or increased their share counts. Typically, companies that have been aggressively buying back stock typically see their share count decrease at market close. These companies include Apple, Alphabet, Chevron, Berkshire, ExxonMobil and Meta. One company, Nvidia, will see the stock count increase.