Signal was right in the sense that AMZN did move up as high as +1.10% while open, and timing was fine — price at decision was flat to slightly down versus prev close with no 30m move, so the M&A pop had not already happened. The dominant factor is the exit: the trade rode from +1.10% unrealized back through to roughly the worst (-0.47%) and closed at -0.57% on entry (258.43 vs 259.9), surrendering the entire favorable excursion. Whether the news itself was the driver of the intraday rise versus general drift can't be settled from this data, but the gap between best unrealized and realized P&L is unambiguous.
📖 Glossary
S1 primary — trades the alert's primary ticker in the direction the article itself indicates; exits at the same day's close.
S2 counterparty — trades the inferred counterparty ticker (weakest signal, LLM-inferred sympathy); exits at the same day's close.
S3 peer — trades an inferred peer ticker (also LLM-inferred sympathy); exits at the same day's close.
S4 overnight — holds the primary ticker from today's close to the NEXT day's close.
Verdicts are decided top-to-bottom, first match wins; REPRICING is also the fallback when nothing else matches (2026-08-08 #220).
UNKNOWN — a needed price input (move since close or move in the last 30m) is missing.
PRICED — |move since previous close| ≥ 2.0%: already reflected in price.
REPRICING — |move in the last 30m| ≥ 0.5%: the tape is actively moving on it. Also covers a quieter move — |move since previous close| in [1.0, 2.0) with a quiet last-30m tape: still developing, not yet priced.
FRESH — |move since previous close| < 1.0%: a genuinely new move.
materiality — how market-moving the story was judged, 0-100 — alerts require materiality ≥ 70.