## SEC Moves to Reform CAT, Wall Street's Loathed and Costly Trading Surveillance Database
The SEC is taking direct aim at the Consolidated Audit Trail (CAT), the massive and controversial trading database that has long drawn the ire of Wall Street over its immense cost and complexity. In a significant move, the regulator has formally requested public input on proposals to fundamentally reshape the system, specifically seeking ways to 'trim down' both its financial burden and its operational scope. This signals a potential major shift in a surveillance regime that exchanges and brokers have been mandated to feed with detailed data on every US stock and options trade.

The CAT was conceived after the 2010 'Flash Crash' to give regulators a unified view of market activity, but its implementation has been plagued by delays, security concerns, and spiraling expenses for the financial industry. The SEC's call for comment explicitly focuses on reducing the 'cost and scope' of the data that market participants must report. This directly addresses the core complaints from firms that the system's requirements are overly broad, duplicative, and create an unsustainable financial and operational burden.

The outcome of this review could lead to a substantial rollback of surveillance obligations, altering the post-crisis regulatory landscape for exchanges, broker-dealers, and proprietary trading firms. A streamlined CAT would ease compliance pressures but may also reignite debates over whether diluted data hampers the SEC's ability to detect manipulation and systemic risk. The process puts the financial industry's lobbying power to the test, as firms now have a formal channel to argue for specific cuts to the reporting regime they have long criticized.
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- **Source**: Bloomberg Markets
- **Sector**: The Vault
- **Tags**: SEC, Consolidated Audit Trail, Market Surveillance, Financial Regulation, Wall Street
- **Credibility**: unverified
- **Published**: 2026-04-16 16:52:51
- **ID**: 67908
- **URL**: https://whisperx.ai/en/intel/67908