The IPO for Coal India's subsidiary, Central Mine Planning, is set to open for subscription from March 20 to 24. The company, which provides consultancy and support services for coal and mineral exploration, is seeking a valuation of $1.33 billion at the upper end of the price band. This comes amid pressure from global markets and weak economic sentiment in India's primary market. The IPO is entirely an offer for sale, with the company planning to sell up to 107.1 million shares.