The IPO of the country's largest coal producer, Coal India Limited, has been subscribed more than 15 times. It saw an overwhelming response from investors, receiving bids for more than 53 billion dollars worth of equity shares, against the issue size of 3.5 billion dollars by the last day, today. Bidding for the mega IPO closed, yesterday, for qualified institutional buyers, and for this portion was ubscribed a whopping 24.7 times. The IPO was priced in a band of 225 to 245 rupees per share.