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October 13, 2026, 3 insights from 12 sourced facts

Korean chips tumble on AI worries while Brent sits near its highs and Bitcoin holds

A chip rout hit KOSPI, oil stayed bid on Hormuz and ceasefire doubts, and Bitcoin held support ahead of CPI.

By Knowledge of Markets, the AI research desk of Market Seasonality. October 13, 2026. Not investment advice.

Big market movesOct 13

KOSPI slides below its long trend line as chip stocks take the hit

5,668.05KOSPI, +2.05% on the day
Supply shocksOct 13

Brent hits $107.25 as the energy ceasefire frays and the IEA eyes diesel

109.86Brent, +3.72% on the day
Big market movesOct 13

Bitcoin defends $82,500 support as CPI and a soft ETF week loom

81,382.15Bitcoin, -0.15% on the day

Markets in this brief

MarketLastDay1 monthYear to dateOct averageOct pattern
KOSPI5,668.05+2.05%-15.63%+34.50%-0.43% 45% upno clear pattern
Nasdaq Composite26,140.03-2.15%+0.62%+12.47%+0.77% 55% upno clear pattern
Brent crude oil109.86+3.72%+3.81%+80.54%-1.01% 53% upno clear pattern
WTI crude oil99.02+1.07%-3.33%+72.45%-1.77% 46% upno clear pattern
Heating oil (ULSD)4.7232-2.53%-9.97%+116.39%-0.37% 42% upno clear pattern
Bitcoin81,382.15-0.15%+6.52%-7.00%+16.63% 75% upweak
Sources (12)
  1. South Korea's KOSPI extended its losses for the week to 7.4% and fell below its 200-day moving average for the first time since late July, with SK Hynix closing more than 10% lower. Cointelegraph, Oct 13
  2. Foreign investors sold around 173 trillion won ($129 billion) of SK Hynix and Samsung shares since the start of 2026, most of the year-to-date KOSPI sales. Cointelegraph, Oct 13
  3. Comments by Broadcom's CEO at a conference in Singapore have been cited as a reason for microchip stocks' slumps on both Monday and Tuesday. MarketWatch, Oct 13
  4. Declines for Samsung and SK Hynix dragged Kospi sharply lower as investors fret over the scale of AI investment. Financial Times, Oct 13
  5. Brent crude reached $107.25, its highest since Sept. 16, after Iran reported that an oil tanker had been hit and was ablaze in the Strait of Hormuz, while WTI spiked past $94 per barrel. Cointelegraph, Oct 12
  6. Oil prices fell early Monday after Donald Trump announced an "energy ceasefire" between Russia and Ukraine, which offset a fresh wave of Houthi attacks on Saudi Arabia. Euronews, Oct 12
  7. The International Energy Agency called on its members to accelerate previously agreed releases from strategic oil reserves, prioritising diesel, and to assess whether additional diesel releases are necessary. Euronews, Oct 12
  8. US CPI is due on Wednesday and PPI on Thursday, with markets seeing CPI at 3.7% year-on-year after 3.4% in August, ahead of the Federal Open Market Committee's Oct. 28 meeting. Cointelegraph, Oct 14
  9. Bitcoin sealed a weekly close above key support at $82,500, avoiding a drop into its previous 2026 macro range between $60,000 and $80,000. Cointelegraph, Oct 12
  10. Bitcoin rebounded toward $84,000 on Tuesday from a low near $81,000, diverging from plummeting Asian tech stocks, with upside capped at $84,000 by a wall of resistance on exchange order books. Cointelegraph, Oct 13
  11. Spot bitcoin ETFs lost $681 million last week. CoinDesk, Oct 12
  12. ASML will report its third-quarter earnings before the opening bell in Amsterdam on Wednesday. MarketWatch, Oct 14

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