Signal: Inconclusive — AMZN traded +0.79% above entry at best and -0.65% below at worst, a roughly symmetric range consistent with ordinary intraday noise rather than a directional response to the Anthropic IPO headline; nothing here shows the news moved the stock at all. Timing: Not the issue — price was only +0.36% off the prior close with a flat last 30 minutes, so the entry wasn't chasing a move that had already happened. Exit: This is the dominant factor — the trade had +0.79% (~+7.80 USD on 4 shares) available and closed at -0.11% (-1.12 USD), giving back essentially all of the unrealized gain before exiting near flat; the exit captured the worst end of what was on offer relative to the best.
📖 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.
