The IPO market will be bustling next week, with four companies, including Bajaj Housing Finance, set to launch their initial share-sale to raise a total of Rs 8,390 crore. Besides these four main-board IPOs, nine SMEs are preparing to debut with their maiden public issues next week, targeting to collect Rs 254 crore. Together, these 13 firms are looking to raise Rs 8,644 crore through IPO.