The stock hit a 52-week low of ₹140.20 before closing at ₹143. On the BSE, over 7 million Delta shares changed hands as against the two-week daily average of 352,000 shares. Investor Ashish Kacholia sold 1.5 million shares worth over ₹21 crore at ₹144.65 apiece on the NSE in Monday's trade, according to the exchange's deal data.