CM003 · Capital Markets

Spoofing

Spoofing is placing orders on one side of an order book with no intention of letting them execute, in order to move the visible order book and induce other participants to trade at a manipulated price, then cancelling the spoof orders and executing genuine trades on the opposite side once the market has reacted. The finding is a convergence finding: it lives in how large a share of order value is never genuinely intended to execute, how fast those orders are cancelled before the market can treat them as real, how much visible depth on one side the spoof orders manufacture, and how much genuine execution happens on the opposite side while the spoof orders are working.

Article 12(1)(a)(ii) of the EU Market Abuse Regulation (MAR) prohibits placing orders with no intention of executing them where they give, or are likely to give, false or misleading signals as to the supply of, demand for, or price of a financial instrument. CM003 detects the order-flow signature of this behaviour.

Risk indicators

Non-Bona-Fide Order Ratio

• Order value materially larger than the trader's genuine execution history would predict
• Orders sized and directed to move the visible book rather than to execute
• Order flow concentrated in a single instrument or a small basket around one venue

Cancellation Speed

• Orders cancelled within seconds of placement, well inside normal market reaction time
• Cancellation timing inconsistent with the trader's normal order-management cadence

Order Book Imbalance Created

• Spoof orders manufacturing a majority share of visible depth on one side
• Depth imbalance inconsistent with genuine two-sided liquidity provision
• Imbalance timed to coincide with opposite-side execution

Opposite-Side Execution

• Genuine execution disproportionate to normal fill rates while the book is skewed
• Execution timing tightly coupled to the spoof orders' cancellation

Investigation actions

1. Resolve the trading account, its broker and the instrument traded.
2. Compute the non-bona-fide order ratio (spoof order value / total order value).
3. Compute the average cancellation speed (average seconds from placement to cancellation).
4. Compute the order book imbalance created (spoof-side depth / total visible depth).
5. Compute the opposite-side execution ratio (opposite-side filled value / spoof order value).
6. Score each of the four components against its band cut-lines.
7. Aggregate the weighted exposure score; escalate at or above the threshold.

Related typologies

Curated from fc-07-capital-markets-analytics-toolkit/typologies/CM003_Spoofing.md