NEW DELHI: A rush of IPOs from businesses good and not so good, and aggressive pricing of such issues are considered important signs of an ageing bull market. Dalal Street has currently been seeing strong subscriptions to all kinds of IPOs, many of which have been deemed aggressively priced. Worse, most of the IPOs with lofty valuations are also commanding strong premia in debut trade. This, some market watchers say, suggests a bubble is building up in the IPO mart. “It’s a no-brainer! Investors are chasing listing gains and are unfazed by valuations. That calls for caution,” say analysts.