According to FINRA, BIDS Trading L.P. was censured and fined $200,000 for overstating its advertised trade volume on Bloomberg and Thomson Reuters by hundreds of millions of shares.

The firm configured its systems to automatically advertise daily trading volume in numerous securities through these major market data providers. However, two separate system changes inadvertently triggered a programming defect in the trade advertising software. This defect caused BIDS Trading to submit multiple end-of-day volume reports for the same securities, resulting in massive overstatements.

Over time, the firm overstated its executed trade volume in 2,041 instances by 439,768,869 shares across 1,043 securities. These inflated volume figures were visible to market participants who relied on Bloomberg and Thomson Reuters data, potentially influencing trading decisions and perceptions of market liquidity.

To the firm's credit, it remediated the programming defect within one week of learning about the issue and reviewed historical data to confirm no other problems existed. However, FINRA found that BIDS Trading lacked a supervisory system reasonably designed to supervise the accuracy of its trade advertisements. The firm had no supervisory process or written procedures to verify that trade volume information reported to Bloomberg and Thomson Reuters was accurate. The firm only implemented such a supervisory process after discovering the overstatements.

Accurate volume reporting is essential for market transparency and fair trading. Participants rely on volume data to assess liquidity, make trading decisions, and evaluate market conditions. When volume is overstated, it can create false impressions about a security's trading activity and potentially influence investment decisions.

For investors, this case illustrates the importance of reliable market data infrastructure and the supervisory systems that should support it. While this violation involved technical and operational failures rather than intentional misconduct, the impact on data accuracy was substantial. Investors should be aware that the market data they rely upon depends on firms having robust systems and supervision to ensure accuracy.