MANCHESTER, N.H. — Americans won’t hear much about stock-market performance and the economy in the same breath if Pete Buttigieg becomes president.

“When I’m president, we’re going to measure the performance of our economy not by the Dow Jones, but by the income growth of the 90%,” the former South Bend, Ind., mayor said in Manchester, N.H., on Friday night as he debated fellow Democratic presidential hopefuls.