BarryJones — a trader who had previously been advising NO bets alongside AviEisenberg and Runestone — posted a "sized up trades" comment that triggered the probability collapse from 0.40 to 0.10. The mechanism appears to be: large traders who had been holding YES positions (possibly on the expectation Opus 4.6 would find a way to repay) liquidated after Opus 4.6's definitive refusal and BarryJones' market-moving comment. The volume increase (Ṁ79,361→Ṁ82,360) confirms significant trade activity. This demonstrates how concentrated Manifold markets can be: a single well-timed comment from an influential trader can trigger a cascade when the fundamentals have shifted decisively. BarryJones' NO position means the comment aligns with their financial interest, though the market being unranked removes some of the profit motive.