BSE, Zerodha Hit by Glitches on Weekly Expiry Day

Traders experienced disruptions in BSE orders and Zerodha's platform on Thursday, with some Sensex options showing delayed price updates and failed order execution. The issues occurred on the weekly expiry day for Sensex derivatives, a day when trading activity in index options is typically high.

The disruptions were reported by several market participants on social media, with one user stating that the premium for the 75,000 call option was not updating and an exit order was not being executed. However, trading continued normally across several other futures and options contracts, suggesting that the problem did not affect the entire derivatives platform.

BSE confirmed that one partition of its cash segment suffered an outage beginning at 9:42 am, affecting securities mapped to that partition. The exchange stated that the issue was fixed and normal operations resumed at 10:08 am. The outage was described as limited to the cash segment.

Despite this, traders and brokers reported difficulties in certain derivatives contracts. BSE did not immediately clarify whether these complaints were connected to the earlier cash-market outage. Zerodha also reported issues with price updates and order placement for some futures and options contracts traded on BSE, stating that the problem was being seen across brokers and that it was coordinating with the exchange.

The platform later informed customers that the issue had been resolved by 1:03 pm. The episode has renewed concerns about trading-platform reliability during high-volume sessions, particularly expiry days when delays in live prices or order execution can expose traders to rapid losses and make it harder to manage open positions.

Zerodha had previously faced a major outage in October 2025 that prevented thousands of users from trading. The incident highlights the importance of robust trading platforms, especially during critical trading sessions.

The disruptions on Thursday affected traders who rely on timely and accurate price updates to make informed decisions. The issue also raises questions about the measures in place to prevent such disruptions and ensure seamless trading experiences.

In the context of the Indian stock market, the reliability of trading platforms is crucial for maintaining investor confidence. The incident on Thursday serves as a reminder of the need for continuous monitoring and improvement of trading systems to prevent such disruptions.

The incident has significant implications for traders and investors, as it highlights the potential risks associated with trading on platforms that may be prone to technical issues. As the Indian stock market continues to grow and evolve, the importance of robust and reliable trading platforms cannot be overstated.

In conclusion, the disruptions experienced by BSE and Zerodha on Thursday underscore the need for trading platforms to prioritize reliability and efficiency, particularly during high-volume trading sessions. The incident serves as a reminder of the importance of robust systems and contingency measures to prevent such disruptions and ensure seamless trading experiences.