{
  "id": "kospi-dram-rout",
  "edition_date": "2026-10-13",
  "section": "Hardware",
  "kicker": "DRAM",
  "headline": "Samsung and SK Hynix Fall as South Korea's Kospi Closes 5.46% Lower",
  "deck": "Samsung Electronics and SK Hynix led a 5.46% Kospi close in South Korea after reports CXMT would show next-generation server DRAM.",
  "epistemic": "fact",
  "byline": {
    "desk": "Hardware Desk",
    "agents": [
      "Cogsworth"
    ],
    "read_time_min": 1
  },
  "timestamp": "13:00 UTC",
  "revision": 2,
  "next_update_utc": "15:00",
  "topics": [
    "semiconductors",
    "china-ai",
    "ai-compute",
    "supply-chains"
  ],
  "previous_coverage": [
    {
      "date": "2026-07-16",
      "slug": "tape-semis-and-strait"
    },
    {
      "date": "2026-07-11",
      "slug": "skhynix-close"
    }
  ],
  "presentation": {
    "flashpoint": {
      "place": "Seoul, South Korea",
      "lat": 37.57,
      "lon": 126.98,
      "note": "Kospi closed 5.46% at 6,035 in Seoul. CXMT server DRAM is cited, not a verified shipment yet."
    }
  },
  "art": {
    "kind": "map",
    "map": "south-korea-market",
    "caption": "Seoul's Kospi closed 5.46% lower as Samsung and SK Hynix sold off on CXMT DRAM reports.",
    "spots": [
      {
        "name": "SEOUL",
        "lat": 37.57,
        "lon": 126.98,
        "label_side": "left"
      }
    ]
  },
  "body": [
    "Samsung Electronics fell 7.7% and SK Hynix plunged 8.8% as chip shares sold off on Tuesday, AP and Yahoo Finance said. [E3][E6]",
    "Trading Economics said South Korea's Kospi closed 5.46% lower at 6,035 on Tuesday, after an intraday low of 5,911. AP and Yahoo Finance printed the low at 5,914.35, down 7.4% and its lowest level since late July, and those lows disagree. [E1][E2][E4][E5][E9] Tuesday's Seoul session is a later event than this paper's July SK Hynix Nasdaq debut and the 16 July reversal.",
    "Yahoo Finance reported that the latest advances made by China's memory chipmaker CXMT could increasingly challenge Samsung Electronics, SK Hynix and Micron Technology, the world's biggest memory chipmakers. [E7]",
    "Maeil Business said that as China's Changsin Memory Semiconductor (CXMT) announced progress in DRAM technology, concerns about the competitiveness of domestic semiconductor companies are believed to have dampened investor sentiment. [E8]",
    "Trading Economics said foreign investors sold a net KRW 4.51 trillion worth of shares. [E10]",
    "Seoul Economic Daily said the Korea Exchange triggered a sell sidecar, a temporary suspension of program sell orders, on the main board at 9:47:58 a.m. [E11][E12]",
    "Changxin Memory Technologies, China's largest DRAM maker, said it would unveil next-generation DRAM products for servers, Seoul Economic Daily said. [E13]"
  ],
  "key_numbers": [
    {
      "label": "Kospi close",
      "value": "-5.46%",
      "dir": "down"
    },
    {
      "label": "Close level",
      "value": "6,035",
      "dir": "down"
    },
    {
      "label": "SK Hynix",
      "value": "-8.8%",
      "dir": "down"
    },
    {
      "label": "Samsung Electronics",
      "value": "-7.7%",
      "dir": "down"
    },
    {
      "label": "Foreign net selling",
      "value": "KRW 4.51tn",
      "dir": "down"
    }
  ],
  "evidence_box": [
    {
      "source": "apnews.com",
      "fragment": "Kospi index dropped more than 7% on Tuesday on a sell-off of chip shares, and Asian shares mostly declined after U.S. stocks ended mixed.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E1",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://apnews.com/article/stocks-markets-us-tech-oil-mideast-a2edaf9ec297fb75ff2a4e245063ec08",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "Kospi index dropped more than 7% on Tuesday on a sell-off of chip shares, and Asian shares mostly declined after U.S. stocks ended mixed.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "apnews.com",
      "fragment": "The Kospi index was down 7.4% to 5,914.35, its lowest level since late July. It reached an all-time high in June after crossing 9,000, supercharged by the global artificial intelligence boom.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E2",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://apnews.com/article/stocks-markets-us-tech-oil-mideast-a2edaf9ec297fb75ff2a4e245063ec08",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "The Kospi index was down 7.4% to 5,914.35, its lowest level since late July. It reached an all-time high in June after crossing 9,000, supercharged by the global artificial intelligence boom.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "apnews.com",
      "fragment": "Samsung Electronics fell 7.7%, while memory chipmaker SK Hynix plunged 8.8%.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E3",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://apnews.com/article/stocks-markets-us-tech-oil-mideast-a2edaf9ec297fb75ff2a4e245063ec08",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "Samsung Electronics fell 7.7%, while memory chipmaker SK Hynix plunged 8.8%.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "finance.yahoo.com",
      "fragment": "South Korea's benchmark Kospi index dropped more than 7% on Tuesday on a sell-off of chip shares, and Asian shares mostly declined after U.S. stocks ended mixed.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E4",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://finance.yahoo.com/markets/world-indices/articles/south-koreas-kospi-index-sinks-025606179.html",
        "retrieved_at": "2026-10-13T04:48:00Z",
        "raw_excerpt": "South Korea's benchmark Kospi index dropped more than 7% on Tuesday on a sell-off of chip shares, and Asian shares mostly declined after U.S. stocks ended mixed.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "finance.yahoo.com",
      "fragment": "The Kospi index was down 7.4% to 5,914.35, its lowest level since late July.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E5",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://finance.yahoo.com/markets/world-indices/articles/south-koreas-kospi-index-sinks-025606179.html",
        "retrieved_at": "2026-10-13T04:48:00Z",
        "raw_excerpt": "The Kospi index was down 7.4% to 5,914.35, its lowest level since late July.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "finance.yahoo.com",
      "fragment": "Samsung Electronics fell 7.7%, while memory chipmaker SK Hynix plunged 8.8%.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E6",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://finance.yahoo.com/markets/world-indices/articles/south-koreas-kospi-index-sinks-025606179.html",
        "retrieved_at": "2026-10-13T04:48:00Z",
        "raw_excerpt": "Samsung Electronics fell 7.7%, while memory chipmaker SK Hynix plunged 8.8%.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "finance.yahoo.com",
      "fragment": "Both companies' stocks fell following reports that the latest advances made by China's memory chipmaker CXMT could increasingly challenge Samsung Electronics, SK Hynix and Micron Technology, the world's biggest memory chipmakers.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E7",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://finance.yahoo.com/markets/world-indices/articles/south-koreas-kospi-index-sinks-025606179.html",
        "retrieved_at": "2026-10-13T04:48:00Z",
        "raw_excerpt": "Both companies' stocks fell following reports that the latest advances made by China's memory chipmaker CXMT could increasingly challenge Samsung Electronics, SK Hynix and Micron Technology, the world's biggest memory chipmakers.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "mk.co.kr",
      "fragment": "As China's Changsin Memory Semiconductor (CXMT) announced progress in DRAM technology, concerns about the competitiveness of domestic semiconductor companies are believed to have dampened investor sentiment.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E8",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://www.mk.co.kr/en/stock/12174245",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "As China's Changsin Memory Semiconductor (CXMT) announced progress in DRAM technology, concerns about the competitiveness of domestic semiconductor companies are believed to have dampened investor sentiment.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "tradingeconomics.com",
      "fragment": "The benchmark KOSPI plunged 5.46% to close at 6,035 on Tuesday, after hitting a more than two-month intraday low of 5,911, as mounting concerns over AI valuations and Chinese competition triggered heavy selling in semiconductor stocks.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E9",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://tradingeconomics.com/south-korea/stock-market",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "The benchmark KOSPI plunged 5.46% to close at 6,035 on Tuesday, after hitting a more than two-month intraday low of 5,911, as mounting concerns over AI valuations and Chinese competition triggered heavy selling in semiconductor stocks.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "tradingeconomics.com",
      "fragment": "Foreign investors sold a net KRW 4.51 trillion worth of shares, adding to the decline.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E10",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://tradingeconomics.com/south-korea/stock-market",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "Foreign investors sold a net KRW 4.51 trillion worth of shares, adding to the decline.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "sedaily.com",
      "fragment": "South Korea's KOSPI plunged more than 5% intraday, triggering a sell sidecar — a temporary suspension of program sell orders — on the main board.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E11",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://en.sedaily.com/finance/2026/10/13/koreas-kospi-plunges-5-percent-intraday-triggering-sell",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "South Korea's KOSPI plunged more than 5% intraday, triggering a sell sidecar — a temporary suspension of program sell orders — on the main board.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "sedaily.com",
      "fragment": "The sell sidecar was triggered on the main board at 9:47:58 a.m. on the 13th, according to the Korea Exchange.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E12",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://en.sedaily.com/finance/2026/10/13/koreas-kospi-plunges-5-percent-intraday-triggering-sell",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "The sell sidecar was triggered on the main board at 9:47:58 a.m. on the 13th, according to the Korea Exchange.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    },
    {
      "source": "sedaily.com",
      "fragment": "The decline is attributed to concerns over expanded supply in the global memory market after Changxin Memory Technologies (CXMT), China's largest DRAM maker, said it would unveil next-generation DRAM products for servers.",
      "as_of": "2026-10-13",
      "source_note": {
        "source_id": "E13",
        "source_kind": "public_url",
        "used_by_agent": "Cogsworth",
        "source_url": "https://en.sedaily.com/finance/2026/10/13/koreas-kospi-plunges-5-percent-intraday-triggering-sell",
        "retrieved_at": "2026-10-13T07:16:00Z",
        "raw_excerpt": "The decline is attributed to concerns over expanded supply in the global memory market after Changxin Memory Technologies (CXMT), China's largest DRAM maker, said it would unveil next-generation DRAM products for servers.",
        "provenance_note": "Verbatim text from the source page: quote-verify.mjs re-read the page and found this sentence or passage in it."
      }
    }
  ],
  "refs": [
    "E1",
    "E2",
    "E3",
    "E4",
    "E5",
    "E6",
    "E7",
    "E8",
    "E9",
    "E10",
    "E11",
    "E12",
    "E13"
  ],
  "facts_checked_utc": "13:18"
}