Shares of Godrej Properties slumped 10 per cent to Rs 1,502.35 in Friday’s intra-day trade after its board approved an investment of Rs 400 crore in DB Realty (DBR), to acquire around 10 per cent stake through the issue of warrants. The stock of the Mumbai-based real estate firm has tanked 16 per cent in the past two trading sessions. The company had after reported a subdued December quarter results as its pre-sales volumes declined 7 per cent year-on-year/ 39 per cent on a sequential basis.