Markets regulator SEBI has approved the IPOs of BlueStone and Aye Finance.SEBI issued observation letters to both companies, indicating no immediate concerns.BlueStone filed a draft prospectus for a ₹1,000 Cr IPO, while Aye Finance filed for a ₹1,450 Cr IPO.SEBI is still reviewing IPO papers of PhysicsWallah and DevX.