{ "metadata": { "report_date_kst": "2026-10-06", "cutoff_inclusive": "2026-10-05", "baseline_date": "2026-06-30", "earliest_included_date": "2026-06-01", "price_type": "Daily close price return, excluding dividends; not total return", "us_source": "Yahoo Finance daily chart close; exchange-local dates", "korean_equity_source": "Naver literal_eval daily close throughout; Yahoo mismatches retained in audit", "benchmarks": "SOXX in USD; KOSPI in KRW", "formulas": { "period_return_pct": "100 * (end_close / start_close - 1)", "index": "100 * close / baseline_close", "usd_equivalent": "100 * ((stock_end / fx_end) / (stock_start / fx_start) - 1)", "july_drawdown_recouped_by_aug7_pct": "100 * (Aug7_close - July_trough_close) / (June30_close - July_trough_close); undefined if baseline <= trough" }, "recovery_definition": "First close >= target strictly after the July 1-31 minimum close date, through each market's final completed session; null means not recovered by cutoff.", "peak_definition": "Maximum daily CLOSE from June 1 through July 31 inclusive, not intraday or all-time high.", "trough_caveat": "A July trough is identified retrospectively and may differ by stock/market. Main comparable recovery window is July 31 to August 7; the trough return is descriptive, not an achievable trading strategy.", "timezone_caveat": "Yahoo timestamps converted using exchangeTimezoneName; Naver dates are Asia/Seoul. October 6 observations excluded. US ends Oct 5; Korea ends Oct 2.", "cross_market_common_endpoint": "Use common_oct2_vs_baseline_pct and usd_equivalent_common_oct2_return_pct for comparisons ending on the same calendar date, October 2.", "fx_caveat": "KRW=X is won per USD, dated using its Europe/London metadata. Same-calendar-date conversion is approximate because stock and FX close times differ.", "corporate_actions_check": "Preserved Yahoo payloads have no events field. No split events can be independently verified from those responses. Adjclose/close factor ranges are recorded as a cross-check, not proof of absence of actions. No dividend reinvestment or extra split transformation is applied." }, "stocks": { "MU": { "symbol": "MU", "name": "Micron", "baseline_date": "2026-06-30", "baseline_close": 1154.2900390625, "july31_close": 823.030029296875, "aug7_close": 877.5700073242188, "july_return_pct": -28.698160649005533, "aug_first_week_return_pct": 6.626730020281024, "july_trough_date": "2026-07-29", "july_trough_close": 739.0, "july_trough_vs_baseline_pct": -35.97796264444882, "trough_to_aug7_return_pct": 18.751015876078327, "july_drawdown_recouped_by_aug7_pct": 33.36704334085036, "aug31_vs_baseline_pct": -16.942020807229817, "final_date": "2026-10-05", "final_close": 1063.9599609375, "final_vs_baseline_pct": -7.825596259876333, "common_oct2_date": "2026-10-02", "common_oct2_close": 1074.8900146484375, "common_oct2_vs_baseline_pct": -6.878689213895517, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-25", "june_july_closing_peak": 1213.56005859375, "final_vs_june_july_peak_pct": -12.327374866770391, "first_recover_june_july_closing_peak_after_july_trough": null }, "COHR": { "symbol": "COHR", "name": "Coherent", "baseline_date": "2026-06-30", "baseline_close": 394.4700012207031, "july31_close": 262.8900146484375, "aug7_close": 379.1300048828125, "july_return_pct": -33.356145249343705, "aug_first_week_return_pct": 44.21620592544095, "july_trough_date": "2026-07-29", "july_trough_close": 222.0500030517578, "july_trough_vs_baseline_pct": -43.709280207717896, "trough_to_aug7_return_pct": 70.74082399109032, "july_drawdown_recouped_by_aug7_pct": 91.10312231713414, "aug31_vs_baseline_pct": -29.568792122972674, "final_date": "2026-10-05", "final_close": 333.6400146484375, "final_vs_baseline_pct": -15.42068760210531, "common_oct2_date": "2026-10-02", "common_oct2_close": 337.0400085449219, "common_oct2_vs_baseline_pct": -14.55877316350086, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-02", "june_july_closing_peak": 426.8900146484375, "final_vs_june_july_peak_pct": -21.844034013490678, "first_recover_june_july_closing_peak_after_july_trough": null }, "LITE": { "symbol": "LITE", "name": "Lumentum", "baseline_date": "2026-06-30", "baseline_close": 858.0599975585938, "july31_close": 713.9400024414062, "aug7_close": 890.1699829101562, "july_return_pct": -16.796027728509287, "aug_first_week_return_pct": 24.6841443071, "july_trough_date": "2026-07-29", "july_trough_close": 602.3499755859375, "july_trough_vs_baseline_pct": -29.800948966298215, "trough_to_aug7_return_pct": 47.782853654844274, "july_drawdown_recouped_by_aug7_pct": 112.55718688843416, "aug31_vs_baseline_pct": 6.607930956851238, "final_date": "2026-10-05", "final_close": 1091.6700439453125, "final_vs_baseline_pct": 27.225374338787578, "common_oct2_date": "2026-10-02", "common_oct2_close": 1085.4200439453125, "common_oct2_vs_baseline_pct": 26.49698704445118, "first_recover_baseline_after_july_trough": "2026-08-07", "june_july_closing_peak_date": "2026-06-02", "june_july_closing_peak": 1029.1500244140625, "final_vs_june_july_peak_pct": 6.074917946666258, "first_recover_june_july_closing_peak_after_july_trough": "2026-10-01" }, "CIEN": { "symbol": "CIEN", "name": "Ciena", "baseline_date": "2026-06-30", "baseline_close": 490.55999755859375, "july31_close": 377.04998779296875, "aug7_close": 412.3900146484375, "july_return_pct": -23.138863814933686, "aug_first_week_return_pct": 9.372769659091817, "july_trough_date": "2026-07-29", "july_trough_close": 330.3699951171875, "july_trough_vs_baseline_pct": -32.65451794655816, "trough_to_aug7_return_pct": 24.826715725850402, "july_drawdown_recouped_by_aug7_pct": 51.2017093958476, "aug31_vs_baseline_pct": -21.966733998271813, "final_date": "2026-10-05", "final_close": 389.69000244140625, "final_vs_baseline_pct": -20.562213718850842, "common_oct2_date": "2026-10-02", "common_oct2_close": 391.3399963378906, "common_oct2_vs_baseline_pct": -20.22586466782833, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-02", "june_july_closing_peak": 627.0, "final_vs_june_july_peak_pct": -37.848484459105855, "first_recover_june_july_closing_peak_after_july_trough": null }, "AAOI": { "symbol": "AAOI", "name": "Applied Opto", "baseline_date": "2026-06-30", "baseline_close": 148.16000366210938, "july31_close": 94.31999969482422, "aug7_close": 135.6300048828125, "july_return_pct": -36.33909465207058, "aug_first_week_return_pct": 43.79771556578489, "july_trough_date": "2026-07-29", "july_trough_close": 76.5199966430664, "july_trough_vs_baseline_pct": -48.353135291777996, "trough_to_aug7_return_pct": 77.24779251555567, "july_drawdown_recouped_by_aug7_pct": 82.50977449518365, "aug31_vs_baseline_pct": -27.31506494357152, "final_date": "2026-10-05", "final_close": 121.56999969482422, "final_vs_baseline_pct": -17.946816488966732, "common_oct2_date": "2026-10-02", "common_oct2_close": 115.58999633789062, "common_oct2_vs_baseline_pct": -21.982995760783886, "first_recover_baseline_after_july_trough": "2026-08-14", "june_july_closing_peak_date": "2026-06-04", "june_july_closing_peak": 202.88999938964844, "final_vs_june_july_peak_pct": -40.08083194807936, "first_recover_june_july_closing_peak_after_july_trough": null }, "SNDK": { "symbol": "SNDK", "name": "Sandisk", "baseline_date": "2026-06-30", "baseline_close": 2273.72998046875, "july31_close": 1214.8299560546875, "aug7_close": 1212.2099609375, "july_return_pct": -46.57105432527043, "aug_first_week_return_pct": -0.21566764172462616, "july_trough_date": "2026-07-29", "july_trough_close": 1015.8900146484375, "july_trough_vs_baseline_pct": -55.32055154416346, "trough_to_aug7_return_pct": 19.324921345644054, "july_drawdown_recouped_by_aug7_pct": 15.607704606605543, "aug31_vs_baseline_pct": -31.095602176610015, "final_date": "2026-10-05", "final_close": 1704.1600341796875, "final_vs_baseline_pct": -25.050025780618, "common_oct2_date": "2026-10-02", "common_oct2_close": 1719.989990234375, "common_oct2_vs_baseline_pct": -24.353814876479596, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-25", "june_july_closing_peak": 2335.0, "final_vs_june_july_peak_pct": -27.016700891662204, "first_recover_june_july_closing_peak_after_july_trough": null }, "SOXX": { "symbol": "SOXX", "name": "SOXX", "baseline_date": "2026-06-30", "baseline_close": 640.760009765625, "july31_close": 504.8900146484375, "aug7_close": 543.27001953125, "july_return_pct": -21.20450606255617, "aug_first_week_return_pct": 7.601656552771607, "july_trough_date": "2026-07-29", "july_trough_close": 465.0, "july_trough_vs_baseline_pct": -27.429928067750964, "trough_to_aug7_return_pct": 16.832262264784937, "july_drawdown_recouped_by_aug7_pct": 44.53232543376769, "aug31_vs_baseline_pct": -20.244709289543785, "final_date": "2026-10-05", "final_close": 589.510009765625, "final_vs_baseline_pct": -7.998314379629601, "common_oct2_date": "2026-10-02", "common_oct2_close": 588.9000244140625, "common_oct2_vs_baseline_pct": -8.093511542727471, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-22", "june_july_closing_peak": 655.010009765625, "final_vs_june_july_peak_pct": -9.999847181486142, "first_recover_june_july_closing_peak_after_july_trough": null }, "005930.KS": { "symbol": "005930.KS", "name": "Samsung", "baseline_date": "2026-06-30", "baseline_close": 334000.0, "july31_close": 262500.0, "aug7_close": 231000.0, "july_return_pct": -21.40718562874252, "aug_first_week_return_pct": -12.0, "july_trough_date": "2026-07-30", "july_trough_close": 207000.0, "july_trough_vs_baseline_pct": -38.02395209580839, "trough_to_aug7_return_pct": 11.594202898550732, "july_drawdown_recouped_by_aug7_pct": 18.89763779527559, "aug31_vs_baseline_pct": -22.15568862275449, "final_date": "2026-10-02", "final_close": 276000.0, "final_vs_baseline_pct": -17.365269461077848, "common_oct2_date": "2026-10-02", "common_oct2_close": 276000.0, "common_oct2_vs_baseline_pct": -17.365269461077848, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-18", "june_july_closing_peak": 362500.0, "final_vs_june_july_peak_pct": -23.862068965517246, "first_recover_june_july_closing_peak_after_july_trough": null, "fx_usdkrw_baseline": 1541.72998046875, "fx_usdkrw_final": 1360.5899658203125, "usd_equivalent_final_return_pct": -6.363824002625251, "usd_equivalent_common_oct2_return_pct": -6.363824002625251 }, "000660.KS": { "symbol": "000660.KS", "name": "SK hynix", "baseline_date": "2026-06-30", "baseline_close": 2650000.0, "july31_close": 1718000.0, "aug7_close": 1422000.0, "july_return_pct": -35.16981132075472, "aug_first_week_return_pct": -17.229336437718278, "july_trough_date": "2026-07-30", "july_trough_close": 1322000.0, "july_trough_vs_baseline_pct": -50.113207547169814, "trough_to_aug7_return_pct": 7.564296520423608, "july_drawdown_recouped_by_aug7_pct": 7.530120481927711, "aug31_vs_baseline_pct": -36.83018867924528, "final_date": "2026-10-02", "final_close": 1842000.0, "final_vs_baseline_pct": -30.490566037735846, "common_oct2_date": "2026-10-02", "common_oct2_close": 1842000.0, "common_oct2_vs_baseline_pct": -30.490566037735846, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-22", "june_july_closing_peak": 2919000.0, "final_vs_june_july_peak_pct": -36.89619732785201, "first_recover_june_july_closing_peak_after_july_trough": null, "fx_usdkrw_baseline": 1541.72998046875, "fx_usdkrw_final": 1360.5899658203125, "usd_equivalent_final_return_pct": -21.2365363870483, "usd_equivalent_common_oct2_return_pct": -21.2365363870483 }, "KOSPI": { "symbol": "KOSPI", "name": "KOSPI", "baseline_date": "2026-06-30", "baseline_close": 8476.48046875, "july31_close": 6595.4501953125, "aug7_close": 6258.77001953125, "july_return_pct": -22.191170974465646, "aug_first_week_return_pct": -5.104733806049122, "july_trough_date": "2026-07-30", "july_trough_close": 5593.56005859375, "july_trough_vs_baseline_pct": -34.010818768292225, "trough_to_aug7_return_pct": 11.892425467310307, "july_drawdown_recouped_by_aug7_pct": 23.074170157248517, "aug31_vs_baseline_pct": -19.541842340409744, "final_date": "2026-10-02", "final_close": 7003.740234375, "final_vs_baseline_pct": -17.37443081246408, "common_oct2_date": "2026-10-02", "common_oct2_close": 7003.740234375, "common_oct2_vs_baseline_pct": -17.37443081246408, "first_recover_baseline_after_july_trough": null, "june_july_closing_peak_date": "2026-06-22", "june_july_closing_peak": 9114.5498046875, "final_vs_june_july_peak_pct": -23.15868161943596, "first_recover_june_july_closing_peak_after_july_trough": null, "fx_usdkrw_baseline": 1541.72998046875, "fx_usdkrw_final": 1360.5899658203125, "usd_equivalent_final_return_pct": -6.37420503618319, "usd_equivalent_common_oct2_return_pct": -6.37420503618319 } }, "source_audit": { "MU": { "raw_file": "MU.json", "raw_sha256": "162071841c401ca8d072c6a94e8a1c5903c8ce8adc2c39ac8a3da054fd4928ac", "source_symbol": "MU", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 0.9998461645589529, 1.0 ] }, "COHR": { "raw_file": "COHR.json", "raw_sha256": "cd8a0be5c1eca0fa11ae646471adb6518fd18b7bcd71afa098b60730fb275d72", "source_symbol": "COHR", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 1.0, 1.0 ] }, "LITE": { "raw_file": "LITE.json", "raw_sha256": "2a3cfda2a0ea0dd0bab8f803a02307574bafe864a5d62f5b46e23cba61f36c23", "source_symbol": "LITE", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 1.0, 1.0 ] }, "CIEN": { "raw_file": "CIEN.json", "raw_sha256": "258f5192fbe16e62463e284d9022ff9de314390e27ccd35df7a326a0017bedfc", "source_symbol": "CIEN", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 1.0, 1.0 ] }, "AAOI": { "raw_file": "AAOI.json", "raw_sha256": "619f1f82c7db885b08817b8a2f3ab5aa99304015ef5744cd1aabc632c1998e4c", "source_symbol": "AAOI", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 1.0, 1.0 ] }, "SNDK": { "raw_file": "SNDK.json", "raw_sha256": "bdb44169a12c6a1d8e2f267ca8fd79107cca3772997f50024927ce657a7fb7ce", "source_symbol": "SNDK", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 1.0, 1.0 ] }, "SOXX": { "raw_file": "SOXX.json", "raw_sha256": "edf49c1e908d4d44e6e88e2b078d5574607639b60893bfad6cae38cb46a6388e", "source_symbol": "SOXX", "exchange_timezone": "America/New_York", "currency": "USD", "source": "Yahoo Finance chart daily close", "raw_rows": 127, "included_rows": 88, "first_included_date": "2026-06-01", "last_included_date": "2026-10-05", "null_close_dates": [], "excluded_after_cutoff": [], "events_field_present": false, "split_events_in_payload": {}, "adjusted_close_factor_range": [ 0.9988722054455786, 1.0 ] }, "005930.KS": { "raw_file": "005930.KS.json", "raw_sha256": "afa7ce767a3a92efadd1c529f02bd8f2f8be884207886a98c9e0e9ca7b0b0d95", "source_symbol": "005930.KS", "exchange_timezone": "Asia/Seoul", "currency": "KRW", "source": "Yahoo Finance chart daily close", "raw_rows": 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