daily
Market breadth
Advance-decline breadth, 20-session high-low balance, and 20-day trend participation.
Observed 2026-10-27 · Fresh
Coverage: the advance-decline summary and advancing-share denominator use provider-listed products that may include ETFs and ETNs. Do not interpret them as stock-only whole-market breadth. Above 20D and 20D H-L use a separate stock sample, with a different population and period.
| Rank | Name | Market | Listed-product advances | Above 20D | 20D H-L |
|---|---|---|---|---|---|
| 1 | KOSPI breadth - | KOSPI | 68.1% | 11% | -20 (2 / 22) |
| 2 | KOSDAQ breadth - | KOSDAQ | 63.9% | 15.2% | -2 (7 / 9) |
Market reading
Put this number in context
Reading the market · 12 min read
Why are my stocks falling when the index rises? Reading breadth and concentration
Recalculate KOSPI and a 30-stock sample's 20-day positions for October 21, 2026 from dated inputs and sources, keeping the observed case separate from fictional teaching examples.
Worked example and checking stepsFX and investor flows · 7 min read
Does a weaker won mean foreign investors will sell? Reading FX and equity flows
Use a fictional 8% stock gain and 10% USD/KRW rise to calculate a roughly −1.82% dollar return, then separate FX observations from claims about foreign investors' motives.
Worked example and checking stepsCredit and liquidity · 7 min read
Can credit rise while its ratio falls? Reading margin balances and investor deposits
Work through fictional margin credit of KRW 20→21 trillion and deposits of KRW 50→60 trillion, separating balance growth, an aggregate ratio and your own account's collateral risk.
Worked example and checking stepsInterpretation guide
How to read market breadth
Market breadth places the provider's listed-product counts beside 20-day trend readings for a stock sample. Their coverage differs. Daily advancing share can include ETFs and ETNs, so it is not stock-only participation for the entire market or a calculation of large-stock contributions to the index.
What it tracks
The advance-decline summary and advancing-share denominator use the provider's listed-product counts, which can include ETFs and ETNs. The 20-session high-low and above-average readings instead use a large-cap stock sample with sufficient history. Stock-only daily breadth requires separate verification against a dated stock list.
- Advancing share refers to the provider's listed-product population, not stocks alone.
- A positive 20D high-low balance means short-term breakouts outnumber short-term breakdowns.
- Above 20D shows how many important stocks remain above their short-term trend line.
How to interpret it
Listed-product advancing share describes one session, while Above 20D describes the stock sample's position relative to its 20-day average. Both the period and population differ, so a gap does not establish a whole-market divergence. Improvement in both does not establish the next rotation or return.
- Check ETF/ETN coverage and observation dates before comparing the index with daily advancing share.
- If advancing share rises while Above 20D remains low, distinguish a daily rebound from recovery above the 20-day average.
- Check high and low counts separately alongside 20D H-L. The same net balance can come from different numbers on each side.
A checking order
Check the observation date, sample coverage and each price's latest date before comparing with a previous observation on the same basis. The page refresh time does not establish that all prices share a date. Separate changing participation from changing coverage; these readings alone do not establish position sizes or stop levels.
- When participation improves, compare high and turnover-spike lists to identify the sectors and stocks behind the change.
- When index and participation directions differ, record large-cap returns alongside advancing and declining counts.
- Compare KOSPI and KOSDAQ separately, and do not treat Above 20D for sampled large names as a whole-market percentage.
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