India, Sept. 16 -- Big IPOs don't come around often, and this one has been in the pipeline for a long time. Retail investors, institutions and even employees have been watching this closely, checking grey market prices and unlisted rates for months. Now that the wait is finally over, here's what you actually need to know before you put your money in.

The IPO Timeline The issue opens on September 17 and closes on September 21, so investors get three trading days to apply. If everything goes as planned, allotment should happen on September 22, and the stock is expected to list on September 24. Worth noting, the listing is happening on the BSE, not the exchange's own platform, since it's the one going public here.

What The Grey Market Is ...