The desk closed Monday in negative territory with $5,242.51 net loss across 37 trades, a sobering reminder that calendar effects remain a persistent headwind even in a positive sentiment environment. AI Pi remains anchored at 50.8%, suggesting modest directional conviction, while the trend regime holds with 100% confidence. Despite the macro backdrop remaining stable ahead of this morning's ISM Manufacturing PMI print (forecast 53.3, previous 52.7), execution deteriorated sharply as the session progressed. The algo models have surfaced a critical pattern: the 08:00 and 09:00 ET windows generated +$4,970 and +$2,390 respectively, averaging $138.06 and $88.52 per trade in profitability, yet Monday as a whole destroyed value at -$225.42 per trade. This divergence points to a structural weakness that kicks in after mid-morning, with the 12:00 to 13:00 ET band consistently underperforming across our NQ strategies. The recommendation engine is flagging hard stops: immediate Monday blackouts and a hard 10:00 ET cutoff are now priority signals for the next optimization cycle. Recent deterioration in the trailing 30-trade sample (profit factor 1.07, win rate 53.3%, negative expectancy of -$54.95) suggests the regime filter is holding correctly but entry/exit logic may be lagging current volatility microstructure. With AVGO earnings due Wednesday morning, vol crush into the event is worth monitoring on any NQ reversal attempts tomorrow.