Hang Seng rises 1.79% on October 9, two U.S. indexes gain about 0.6%, Shanghai edges higher

Hang Seng posts a larger gain, while Shanghai closes nearly flat

On October 9, the latest completed trading day for each market, the Hang Seng Index rose 1.79% from its October 8 close, while the Shanghai Composite gained 0.05%. The Hang Seng's gain was larger, but these two indexes cannot represent the performance of all sectors in Hong Kong equities and A-shares.

Sources: [4] [3]

Both U.S. indexes rise

On October 9, the S&P 500 rose 0.59% from its October 8 close, while the Nasdaq Composite gained 0.64%. The two indexes moved in the same direction with similar gains. This edition's data can confirm only changes at the index level; it cannot establish the contributions of specific sectors or individual stocks.

Sources: [1] [2]

Trading dates match, but measurement windows do not fully overlap

All four stock indexes use close-to-close comparisons from October 8 to October 9. In UTC, the Shanghai Composite's measurement window ends at 07:00 on October 9, the Hang Seng's at 08:00, and both U.S. indexes' at 20:00. Closing higher on the same date, October 9, therefore does not mean they rose during the same period, nor is it sufficient to establish common drivers.

Sources: [3] [4] [1] [2]

What to watch next

• Whether the difference in gains between the Hang Seng Index and Shanghai Composite persists on the next completed trading day.
• Whether the S&P 500 and Nasdaq Composite continue moving in the same direction on the next completed trading day.
• Once valid close-to-close comparisons are available for the CSI 300 and Hang Seng TECH Index, whether their movements align with those of the corresponding market indexes covered in this edition.
• Once updated data and clearly defined comparison windows are available for Bitcoin and Ethereum, observe how their direction of movement relates to that of stock indexes.