<Table> Securities and Exchange Board of India <Tr> <Td_colspan="2"> भारतीय प्रतिभूति और विनिमय बोर्ड </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> SEBI Bhavan, Mumbai headquarters </Td> </Tr> <Tr> <Th_colspan="2"> Agency overview </Th> </Tr> <Tr> <Th> Formed </Th> <Td> 12 April 1992 </Td> </Tr> <Tr> <Th> Jurisdiction </Th> <Td> Government of India </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> Mumbai, Maharashtra </Td> </Tr> <Tr> <Th> Employees </Th> <Td> 643 + (2012) </Td> </Tr> <Tr> <Th> Agency executive </Th> <Td> <Ul> <Li> Ajay Tyagi, Chairman </Li> </Ul> </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.sebi.gov.in </Td> </Tr> </Table> <Tr> <Td_colspan="2"> भारतीय प्रतिभूति और विनिमय बोर्ड </Td> </Tr>

Who has been appointed as the new chairman of sebi