<h1>Agency files supplementary chargesheet alleging multiple brokers and exchange insiders helped firms get preferential high-speed market access</h1> A federal investigative agency filed a supplementary chargesheet in the co-location trading scandal, alleging additional broker firms' involvement and detailing their modus operandi in obtaining preferential market access. The probe follows an earlier 2022 chargesheet against a former exchange MD/CEO and others; the original FIR lodged in 2018 named a trader and a brokerage under penal provisions for criminal conspiracy, the Information Technology law, and anti-corruption statutes. Authorities allege certain exchange officials aided the brokerage in connecting to a backup server to gain faster market feed by exploiting the exchange's time-bandwidth architecture using specialized software.