Commentary  In 1977, I co-authored the book, “Winning With Money,” explaining the relationship between the money supply and stock prices. Our work confirmed that while money supply changes impact the economy, six-to-nine-months later, the lag is much shorter for stock prices. Understanding this relationship between money and stocks prices is essential for investing in stocks. In recent decades, watching the money supply has fallen out of favor. Ironically, Federal Reserve officials, who control the nation’s money supply, seem to have the least interest in money. Fed Chairman Jerome Powell has forcefully dismissed the importance of the money. In his testimony to Congress on Feb. 24, 2021, he said, “There was a time when monetary policy aggregates were important determinants of inflation and that has not been the case for a long time.” Powell readily admits the money supply is not a key factor in the Fed’s policy decisions. Instead, they …