Realty Income Corp. shares gained ground on Friday, giving income investors a fresh reason to revisit one of the market’s best-known monthly dividend stocks. The real estate investment trust, or REIT — a company structure that owns income-producing real estate and pays out most taxable income to shareholders — rose 1.31% to close at $62.72, while the S&P 500 advanced 0.50% and the Dow Jones Industrial Average climbed 0.70%. Realty Income also outpaced Kimco Realty, Regency Centers and Federal Realty in the session, according to market data.