Two US stock indexes diverge as Shanghai Composite and Hang Seng edge higher

For the completed trading session on September 30, the S&P 500 fell 0.25% and the Nasdaq Composite rose 0.24%; the Shanghai Composite and Hang Seng Index gained 0.31% and 0.37%, respectively. The stock indexes with available data in this edition did not move in a consistent direction. Cryptocurrency data was stale and could not be included in the comparison for the same period.

Concept illustration for this cross-market observation
Market Pulse concept illustration; not a market data chart.

One US index falls while the other rises

Comparing the September 29 and September 30 closes, the S&P 500 fell 0.25% and the Nasdaq Composite rose 0.24%. The two indexes moved in opposite directions. This edition's data alone does not support describing the session as a broad rise or fall in US stocks.

Sources: [1] [2]

Shanghai Composite and Hang Seng both rise

Comparing each index's September 29 and September 30 closes, the Shanghai Composite rose 0.31% and the Hang Seng Index gained 0.37%. Both rose while the S&P 500 fell. However, the performance of a single index is insufficient to represent every sector in its market.

Sources: [3] [4] [1]

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What to watch next

  • Whether the S&P 500 and Nasdaq Composite continue to move in opposite directions in the next completed trading session.
  • Whether the CSI 300 and Hang Seng TECH Index move in the same direction as the Shanghai Composite and Hang Seng Index once usable closing data becomes available.
  • Whether Bitcoin and Ethereum can add to the cross-asset analysis once their data is updated to a valid reporting window.
  • Whether subsequent official announcement summaries provide details on CoreWeave's deployment progress or the provisions of the Federal Reserve's stress test changes.

Market data

First eight instruments with available percentage changes. Measurement windows may differ; see dates and sources below.
The chart uses the first eight instruments with available changes. Each has its own session or measurement window, so these are not directly comparable returns over one period.
Market records and measurement windows used in this edition
InstrumentPriceChangeSession / window endSourceQuality
S&P 500^GSPC7,651.54-0.25%2026-09-30Yahoo Finance chartAvailable
Nasdaq Composite^IXIC26,861.0645+0.24%2026-09-30Yahoo Finance chartAvailable
SSE Composite000001.SS3,842.1951+0.31%2026-09-30Yahoo Finance chartAvailable
CSI 300000300.SS——Not providedYahoo Finance chartNo reliable data
Hang Seng Index^HSI24,613.2695+0.37%2026-09-30Yahoo Finance chartAvailable
Hang Seng Tech Index^HSTECH——Not providedYahoo Finance chartNo reliable data
BitcoinBTC83,622.4297+0.14%2026-09-29Yahoo Finance chartStale
EthereumETH2,676.7222-0.44%2026-09-29Yahoo Finance chartStale

Sources and method

Stocks use their latest complete sessions; crypto assets have explicit measurement windows. Dates are listed in the table. Interpretations are separated from observed facts and can be checked against the original sources below. Read the measurement policy.

  1. S&P 500 — Yahoo Finance chart
  2. 纳斯达克综合指数 — Yahoo Finance chart
  3. 上证指数 — Yahoo Finance chart
  4. 恒生指数 — Yahoo Finance chart
  5. NVIDIA Opens Applications for 2027–2028 Graduate Fellowships With Awards Up to $60,000
  6. From Training to Production, NVIDIA and CoreWeave Close the Loop on Agentic AI
  7. Federal Reserve Board finalizes changes to enhance the transparency and public accountability of its stress test and reduce volatility in its stress test-related capital requirements

For information only, not investment advice. Read all daily observations