By Stephen Culp NEW YORK (Reuters) – Wall Street see-sawed and crude prices plunged on Monday as world factory data showed demand weakening under inflation pressures, while the looming possibility of recession curbed risk appetite. All three major U.S. indexes were last modestly lower on the first day of August, coming on the heels of the S&P 500’s and the Nasdaq’s biggest monthly percentage gains since 2020. “It seems like a day of rest, a breathing day,” said Peter Tuz, president of Chase Investment Counsel in Charlottesville, Virginia. “It’s the first day of a new month and the markets did …