daily
US market breadth
NYSE, Nasdaq, and AMEX advance-decline breadth, 52-week high-low balance, and 20-day trend participation.
Observed 2026-10-27 · Fresh
| Rank | Name | Market | Metric | Above 20D | 20D H-L |
|---|---|---|---|---|---|
| 1 | NYSE breadth - | NYSE | 51.5% | 58% | -8 (0 / 8) |
| 2 | NASDAQ breadth - | NASDAQ | 55.6% | 52.8% | -2 (0 / 2) |
| 3 | AMEX breadth - | AMEX | 44.4% | 36.1% | 0 (0 / 0) |
Interpretation guide
How to read U.S. market breadth
The U.S. Market Breadth radar shows what index levels alone cannot: whether participation is broad across U.S. equities. By comparing NYSE, Nasdaq, and AMEX breadth, 52-week high-low balance, and 20-day trend participation, the screen separates broad risk appetite from a rally led by only a handful of mega-cap stocks.
What it tracks
The screen measures breadth across U.S.-listed common stocks and depositary receipts above a market-cap threshold. Because it is based on individual-stock participation rather than index levels, it is useful for identifying narrow mega-cap-led markets.
- NYSE breadth reflects a broader mix of industrials, financials, cyclicals, and value stocks.
- Nasdaq breadth is more sensitive to technology and growth-stock risk appetite.
- AMEX has a smaller sample and is best treated as a secondary signal.
How to interpret it
When advancing share and Above 20D both improve, U.S. equity risk appetite is broadening. If Nasdaq indexes rise while breadth stays weak, the rally may be concentrated in mega-cap technology stocks.
- Compare advancing share with the previous observation for the same exchange and sample to see whether daily participation increased.
- Distinguish Above 20D from the daily return, and check valid sample counts and observation dates when comparing readings.
- More 52-week lows than highs warns that medium-term internal strength is deteriorating.
How to respond
Strong U.S. breadth can support global risk appetite and spill over into Korean growth and semiconductor stocks. Weak breadth means investors should be careful about using headline Nasdaq strength as a broad bullish signal.
- When NYSE and Nasdaq participation both improve, check advancing counts and trading value in each. This combination alone does not determine Korean equity exposure.
- If only Nasdaq is strong, check sector participation and index contributors. An exchange-level difference alone cannot identify mega-caps or AI stocks as the cause.
- If breadth deteriorates quickly, cross-check VIX, the dollar, and interest-rate signals.
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