Wall Street Week Ahead: Summer rebound in US stocks gains fans among chart-watching investors
Among these are measures that show the "breadth" of a market move, or whether a significant amount of stocks are rising or falling in unison. A period of narrowing breadth late last year came as a worrying sign to some investors and preceded the start of a decline in the S&P 500 in which stocks fell nearly 21% in the first half of 2022.