The domestic equity market tumbled on Monday, mirroring weakness in other global stock markets. The barometer index, the S&P BSE Sensex, fell 372.17 points or 0.99% to 37,090.82, as per the provisional closing data. The Nifty 50 index fell 144.45 points or 1.28% to 11,134.45, as per the provisional closing data. Investors are concerned about global economic growth after trade negotiations between the US and China appeared at a deadlock.