Trading of semiconductor firm's stock, that gained 55,000% in 20 months, restricted

Trading of RRP Semiconductor, which has gained over 55,000% in 20 months, has been restricted on account of a surveillance measure, according to BSE's website. Once the world's best-performing stock, the company's share price had surged despite posting negative revenue in its last financial results and has only two full-time employees. SEBI is reportedly looking into the surge.