MONEY RADAR
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MARKET BRIEFING · US

On a day when neither data nor rates moved, one set of Musk earnings pulled the market, chips included, higher.

October 21, 2026 · Read the Korean original

Major indices

  • Dow 52,856.09 +0.69%
  • S&P 500 7,757.17 +0.58%
  • Nasdaq 26,702.86 +1.05%
  • PHLX Semiconductor +1.97%

Macro barely moved overnight. No fresh data landed, and attention stayed fixed on next week's Federal Reserve meeting on October 27-28. Futures markets put the odds of a hold at this meeting in the 80% range and have pushed hike expectations out to December, Kitco reported. The 10-year Treasury yield therefore sat in the 5.1% area and the 2-year in the 4.7% area. Oil was the exception. Continued tanker attacks around the Strait of Hormuz pushed Brent back above $110 a barrel and carried WTI close to $99, per Oilprice and FXStreet. Oil is effectively blocking the path lower for yields, and a weaker dollar and gold's return above $4,130 an ounce reflected the same unease.

With data and rates sitting still, corporate results did the lifting. The Dow rose 0.69% to the 52,856 area, the S&P 500 added 0.58% to 7,757.17, and the Nasdaq gained 1.05% for a third straight advance. The standout was the Philadelphia Semiconductor Index, up 1.97%. With 29 of its 30 members higher, the reversal of a near two-week slide in chips extended to a second day, according to TradingKey. Because large-cap technology carried the session, smaller companies could not keep pace with the indexes.

The catalysts came in two strands. The first was SpaceX (SPCX, launch and satellite communications). The company said third-quarter revenue grew 161% from a year earlier to $14.58 billion and delivered its first profit, sending the stock up 7.79%, and Tesla (TSLA, EVs and autonomy) rose 3.41% after Musk said both boards had formed special committees to weigh a merger. The second was Super Micro Computer (SMCI, AI servers), which lifted quarterly revenue guidance to $18.5-19.5 billion and raised its margin outlook, tilting the argument over AI hardware demand to one side and pulling up Dell (DELL, AI servers), NVIDIA (NVDA, AI accelerators (GPU)) and AMD (AMD, CPUs & GPUs) with it. AI cloud names, shaken last week by a single Musk post, recovered as he dismissed overcapacity worries as "ridiculous", with Nebius (NBIS, AI neocloud) and CoreWeave (CRWV, GPU neocloud) each retracing about 3%.

The losers were the names carrying a story about growth cooling. Netflix (NFLX, video streaming) fell 5.12% to a two-year low after guiding fourth-quarter revenue below expectations and trimming this year's advertising revenue target. Alphabet (GOOGL, search and cloud) slid close to 2% as CEO Sundar Pichai's explanation that Google Cloud is limiting customer capacity to prioritize compute for frontier research was read as giving up revenue. After the close, Meta (META, social media and advertising) and IBM rose on results above expectations, while Lam Research (LRCX, etch and deposition equipment) fell more than 5% on guidance despite beating.

Three threads are worth watching in Korea today. For semiconductors, two straight gains in the US chip index and an upgraded AI server demand outlook are material that can carry into memory names, but after Seoul's sharp rebound the day before, the question is whether foreign buying persists. Power infrastructure is where AI data-center electricity demand became a talking point again; Bloom Energy (BE, fuel-cell power) climbing more than 6% intraday ahead of its results shows the temperature there. For EV batteries and autos, the merger review could raise both hopes and uncertainty depending on how it changes the weight of Tesla's EV business. The Bank of Korea's rate decision also falls today, and while US yields stay in the 5% range, valuation pressure travels with every one of these sectors.

What is confirmed is the index moves, the earnings and guidance figures companies released themselves, and the special committees Musk disclosed. The reading that the AI hardware demand debate has tilted toward demand is press and market interpretation, and it will be tested again by the remaining big tech reports this week and by next week's Fed meeting.

Korean industries to watch today

  • Semiconductors · A second straight rebound in US chips and raised AI server demand forecasts
  • Power infrastructure · Renewed focus on AI data-center electricity demand
  • EV batteries · The Tesla-SpaceX merger review clouds the weight of the EV business

Watchlist stocks in the news

  • SpaceX (SPCX) Close +7.79% · Surged after reporting 161% revenue growth and its first profit. (Yahoo Finance)
  • Tesla (TSLA) Close +3.41% · Rose after both boards formed special committees to weigh a SpaceX merger. (CNBC)
  • NVIDIA (NVDA) Close +2.50% · Led the chip rebound as AI server demand forecasts were raised. (TradingKey)
  • AMD (AMD) Close +3.36% · Among the biggest chip gainers as AI hardware demand hopes revived. (TradingKey)
  • Netflix (NFLX) Close -5.12% · Slid to a two-year low on soft Q4 revenue guidance and a cut ad revenue target. (24/7 Wall St.)
  • Alphabet (GOOGL) · Fell as Google Cloud limiting customer capacity for frontier research read as ceding revenue. (24/7 Wall St.)
  • Micron (MU) · Up around 2% in afternoon trading as memory demand hopes revived. (CNBC)
  • Marvell Technology (MRVL) · Gained about 2% intraday on data-center chip demand hopes. (CNBC)
  • VanEck Semiconductor ETF (SMH) · The semiconductor ETF rose about 2% intraday as chips broadly advanced. (CNBC)
  • Nebius (NBIS) · Retraced part of last week's drop after Musk dismissed AI overcapacity worries. (24/7 Wall St.)
  • CoreWeave (CRWV) · Up about 3% intraday as the AI cloud overcapacity debate cooled. (24/7 Wall St.)
  • Oracle (ORCL) · Edged higher alongside the rebound in AI cloud names. (24/7 Wall St.)
  • Dell (DELL) · Jumped as Super Micro's raised revenue outlook was read as an AI server demand signal. (Yahoo Finance)
  • Bloom Energy (BE) · Rose more than 6% intraday on data-center power demand hopes ahead of its results. (CNBC)
  • Meta (META) · Up 2% intraday as investors positioned ahead of its after-the-bell results. (CNBC)
  • Strategy (MSTR) · Climbed 7% intraday as crypto-linked names rebounded together. (CNBC)
  • SMCI (SMCI) · Lifted quarterly revenue guidance to $18.5-19.5 billion and raised margins, boosting AI server demand hopes. (Yahoo Finance)

Sources (Korean-language)

This market briefing was compiled by AI from this site's own price and filing data together with public news reports, and translated from the Korean original. Please check the sources below before relying on it.

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