September 30, 2026

Production risk starts where the backtest ends is easy to describe and harder to operate. The gap between the two is where trading risk accumulates.

Trace the failure chain: 1) replay realistic message order and latency; 2) simulate rejects, partial fills, disconnects and stale data;

Where does your process draw the line between an acceptable execution variation and a risk event?

#Backtesting #AlgoTrading

The research behind this lesson

This paper explains Andrew Lo's lectures build risk analysis from return distributions and statistical measures, rather than treating one realised result as a complete description of risk.

Applied to this XCore lesson: For a fast strategy, median latency or average fill quality is not enough. The review has to include tail delays, stale-order frequency and the loss distribution when cancellation or routing behaves abnormally.

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Source: Risk and Return

Educational content only. Trading leveraged products involves risk.