COT EUR/USD — Killed April 2026

Hypothesis: CME Euro FX speculator (non-commercial) extreme positioning (legacy 1999–2022) is a contrarian signal. Extreme speculator long = EUR overvalued, expect decline. Extreme speculator short = EUR undervalued, expect rally.

Battery result: 0 of 4 tests passed. Kill type: DIRECTIONAL INVERSION.

The finding: At extreme speculator long EUR, the euro RISES approximately 73% of the time in the subsequent period. This is the opposite of the contrarian premise. Speculative extremes in EUR/USD appear to be momentum signals, not mean-reversion signals.

Test 1 — Monte Carlo null: Hit rate in the stated contrarian direction is below 50% — the directional hypothesis is wrong.

Test 2 — Blind era-split replication: The direction of the effect is consistent across eras, which makes this worse: the inversion is stable, not a fluke. If we had tested the momentum version of this signal (follow extremes rather than fade them), it might have survived. But that is not the stated hypothesis.

Test 3 — Specificity vs negative controls: The contrarian version fails specificity. The momentum version was not the hypothesis under test.

Test 4 — Mechanism sensitivity: The over-extension-and-reversion mechanism assumes speculators are wrong at extremes. In EUR/USD, the evidence is that large speculator positioning at extremes reflects genuine macroeconomic consensus (growth differentials, rate expectations) and tends to be more right than wrong.

Failure mode: DIRECTIONAL INVERSION. This is the most dangerous failure mode: a signal that looks tradeable but trades in the wrong direction. Someone following the contrarian premise on EUR/USD COT data would have faded rising EUR positions into further strength 73% of the time.

Note on previous status: This signal previously carried a CONFIRMED verdict in the pre-battery corpus. That verdict is superseded. The full 5-test battery is the definitive assessment. COT EUR/USD is killed for all directional trading purposes.