At 9.45 a.m., the S&P BSE Sensex traded at 58,198 points, down 0.26 per cent.
It opened at 57,983 points from the previous close of 58,465 points.
Also Read | Over 13mn dependent on coal economy in India: Study
Till now it touched a high of 58,247 points and a low of 57,718 points.
Besides, the broader 50-scrip Nifty at the National Stock Exchange (NSE) opened at 17,796 points after closing at 17,416 on Monday.
It traded at 17,364 points, down 0.14 per cent during the early-morning trade session.
Also Read | Sale of illegal items on Amazon continuing; police seized 48 kg marijuana in Visakhapatnam: CAIT
Investors fear a potential outflow of a large chunk of funds out of the market, analysts opined.