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"2026-10-07", "close": 130100 }, { "date": "2026-10-08", "close": 126700 }, { "date": "2026-10-12", "close": 128800 }, { "date": "2026-10-13", "close": 132000 }, { "date": "2026-10-14", "close": 130700 }, { "date": "2026-10-15", "close": 129900 }, { "date": "2026-10-16", "close": 129700 }, { "date": "2026-10-19", "close": 129400 }, { "date": "2026-10-20", "close": 129400 }, { "date": "2026-10-21", "close": 130500 } ], "twentyDayMean": 129275, "aboveTwentyDay": true, "evidence": { "sha256": "b90ee2ca25a2c3b0ea4a2d84604d4750f93a21d82040713ac4e06bb583b382f8", "receivedAt": "2026-10-21T12:43:10.465Z" }, "crossCheck": { "historyPreviousClose": 129400, "previousPriceMatches": false, "directionMatches": true } } ], "priceUnit": "KRW" }, "validation": { "hashesChecked": 32, "sameLatestDate": "2026-10-21", "samePreviousDate": "2026-10-20", "latestHistoryAndListPriceMismatchCount": 0, "previousPriceMismatchCount": 30, "directionMismatchCount": 7, "publishedDailyAdvancingShare": null, "reasonDailyAdvancingShareWithheld": "For all 30 securities, the 2026-10-20 history close differs from the prior-price basis implied by the 2026-10-21 quote list. Seven daily directions differ. Do not present the history-derived advancing count as official daily market breadth.", "limitations": [ "The 20-day result reproduces the frozen NAVER history inputs only. The unresolved prior-price discrepancy limits comparisons to official regular-session breadth.", "Common and preferred shares can represent the same company; the denominator is 30 securities, not 30 distinct companies.", "A market-cap-ranked sample cannot estimate whole-market participation without a representative sampling design.", "A one-day capitalization-weighted index return and a sample share above a 20-observation mean have different populations, weights and time horizons.", "These inputs do not establish constituent contributions, the cause of the index rise, trading signals, or future returns.", "Original-response SHA-256 values identify the collection records used in verification; a hash is not proof that a provider price is correct." ], "reportedCountPageSnapshots": 1 }, "reportedIndexBreadth": { "observedOn": "2026-10-21", "checkedAt": "2026-10-21T12:51:31.451Z", "source": "https://stock.naver.com/domestic/index/KOSPI/price", "advancers": 372, "unchanged": 53, "decliners": 490, "total": 915, "method": "provider displayed counts; not independently recounted", "scope": "Counts reported in the NAVER KOSPI index page, separate from the mixed-product rankings and the fixed 30-security history sample.", "evidenceSha256": "8014f942ea98cc13b2b342e27afb16af2f12a43e6e62c5d6150b8d4dfc3d4f33", "evidenceType": "Saved browser-visible page observation; one record, separate from the 32 underlying index, selection and daily-history response hashes." } }