Tokyo stocks opened nearly flat Tuesday as possible further COVID-19 lockdowns in China raised fears over their impact on the global economy, while an overnight slump in crude oil futures eased concerns over inflation. In the first 15 minutes of trading, the 225-issue Nikkei Stock Average rose 42.61 points, or 0.16 percent, from Monday to 26,633.39. The broader Topix index was down 0.48 point, or 0.03 percent, at 1,876.04. On the top-tier Prime Market, gainers were led by rubber product and real estate issues, while mining and nonferrous metal issues led decliners. At 9 a.m., the dollar fetche…