The Securities and Exchange Board of India (Sebi) today enhanced the threshold for the basic service demat account (BSDA) to Rs 10 lakh from the previous Rs 2 lakh in a bid to boost the participation of retail investors in the securities market. The BSDA facility, introduced by Sebi in 2012, is a more basic version of a regular demat account. It was introduced to reduce the burden of demat charges on investors with small portfolios.