Jane Street India Ban Threatens 900% Rally for Asia’s Oldest Stock Exchange

Asia’s oldest stock exchange was preparing to celebrate its 150th anniversary when a storm of bad news upended the festivities.

On Monday, a report revealed deepening losses in equity derivatives among India’s retail traders, fueling concerns that the Securities and Exchange Board of India may impose tighter curbs. Just days earlier, the regulator barred Jane Street Group from dealing in local markets, alleging the trading giant manipulated prices to make billions of dollars at the expense of small investors — charges the US firm has denied.