Day to day discussions on S/P, page-137

For the numpties like me that don't know what index rebalancing means:

https://www.thebalance.com/msci-index-what-is-it-and-what-does-it-measure-3305948

'Each index is updated daily, Monday through Friday. Additionally, each index is reviewed quarterly and rebalanced twice a year. That's when its manager adds or subtracts stocks to make sure the index still accurately reflects the composition of the underlying equity market it measures.

For that reason, MSCI indexes have the power to change the market.  When an index is rebalanced, all the ETFs and mutual funds that track it must buy and sell the same stocks. Stocks that are added to the index usually find their share prices rising. Tthe opposite happens to stocks that are dropped from an index.'