Market regulator Securities and Exchange Board of India (SEBI) has decided to keep unchanged its Rs5 lakh penalty imposed on Sasidhar V, former head of customer service at Taurus Mutual Fund (TMF), for tampering with the date and time stamping machine (DTSM) at Taurus Asset Management Co (AMC) Ltd. SEBI was hearing the case afresh as per directions from the securities appellate tribunal (SAT).