// Today's Imbalances · May 15, 2026
2 readings today
MOC
Market on Close
21:50 · May 15
Claude Analysis · AI-generated
Heavy institutional sell pressure into close. The -$1.717B Nasdaq imbalance is particularly significant — nearly 3x the S&P imbalance in dollar terms, confirming tech-led selling. Mag7 at -$636M suggests rotation out of mega-cap tech. Dow's minimal -$62M imbalance indicates value stocks are relatively resilient. Expect a weak close with tech underperforming.
MOO
Market on Open
15:30 · May 15
Claude Analysis · AI-generated
Broad buy imbalance signals institutional accumulation at open. Nasdaq leading at +$297M with Mag7 contributing +$186M suggests tech-focused buying. The broad participation across all indices — S&P, Nasdaq, Dow and Mag7 all positive — indicates genuine risk-on sentiment rather than sector rotation. Expect a gap-up open with tech outperforming.
Imbalance History — Last 7 Days
S&P 500
Nasdaq
Dow 30
// Recent History
| Date & Time | Type | S&P 500 | Nasdaq 100 | Dow 30 | Mag 7 | Signal |
|---|---|---|---|---|---|---|
| May 15 · 21:50 | MOC | -1,144 mln | -1,717 mln | -62 mln | -636 mln | 🔴 Bearish |
| May 15 · 15:30 | MOO | +188 mln | +297 mln | +76 mln | +186 mln | 🟢 Bullish |
| May 14 · 21:45 | MOC | +320 mln | +580 mln | -45 mln | +290 mln | 🟢 Bullish |
| May 14 · 15:30 | MOO | -210 mln | -380 mln | +90 mln | -175 mln | 🔴 Bearish |
| May 13 · 21:50 | MOC | +45 mln | +120 mln | -30 mln | +88 mln | 🟡 Neutral |
What is MOO Imbalance?
Market-on-Open (MOO) imbalances represent the net difference between buy and sell orders queued for execution at market open. Large positive imbalances signal institutional buying pressure at the open.
- Published ~15 minutes before market open
- Positive = more buy orders than sell orders
- Large imbalances often predict gap-up or gap-down opens
- Mag 7 imbalance shows mega-cap tech sentiment
What is MOC Imbalance?
Market-on-Close (MOC) imbalances show institutional order flow heading into the closing auction. These are often the most significant as index funds and ETFs rebalance at close.
- Published ~30 minutes before market close
- Negative = heavy sell pressure into close
- Nasdaq imbalance drives tech stock direction
- All data analyzed in real-time by Claude AI