The Second Day Was Still Sorting Positions
May 15 followed May 14 without an immediate repair. The SSE fell another 1.02%, the Shenzhen Component lost 1.17%, and the STAR 50 dropped 1.67%; across Shanghai, Shenzhen, and Beijing A-shares, 1,816 names rose while 3,584 fell. This did not look like a one-day sentiment hit that vanished immediately; positioning was still being sorted the next day.
On the same day, the semiconductor sector moved -0.01%, with 77 constituents up, 100 down, and 0 flat. Read STAR next to semiconductors and the day’s risk appetite becomes easier to locate.
Where the Selling Pressure Showed Up
The key on May 15 was that the market did not repair immediately. Across Shanghai, Shenzhen, and Beijing A-shares, 1,816 names rose, 3,584 fell, and 95 were flat. Shanghai turnover was 1.519 trillion yuan, and combined turnover was about 3.370 trillion yuan. Better than May 14, yes; recovered, no.
Market-wide large-order flow was a net outflow of 113.44 billion yuan, and semiconductor large-order flow was a net outflow of 18.12 billion yuan. The semiconductor index was nearly flat at -0.01%, but inside the sector 77 names rose and 100 fell. The index looked steady; flows and breadth did not. That was the second negative session: selling pressure did not become a crash, but it had not cleared either.
The Other Side
Flip the reading and at least four points deserve a discount.
One session is not a new trend. A single day of style divergence may be position rebalancing, or just an extension or repair of the prior move. It is not enough evidence to declare that a new line has been established.
Breadth tells participation, not quality. 1816 advancers and 3584 decliners describe market direction inside the index, but they do not tell whether the rising names are higher-quality businesses or whether the demand has persistence.
Large-order flow has to be used carefully. A net outflow of 113.44 billion yuan is not small, but it is a trade-size bucket, not a direct read on institutional intent. It is useful as supporting evidence, not as a standalone conclusion.
Semiconductor beta magnifies the narrative. Semiconductors moved -0.01% on the day, but this sector is structurally volatile. Explaining every move as a fundamental change risks over-attribution.
Those objections hold. The note records structure without assigning direction.
The Takeaway
No forecast, and no trading conclusion pinned on this session.
One set of numbers is enough: the SSE at -1.02%, the STAR 50 at -1.67%, ChiNext at -0.56%; Shanghai-Shenzhen-Beijing A-shares at 1816 up versus 3584 down; market-wide large-order flow at -113.44 billion yuan, and semiconductors at -0.01%. The point is to split the index move into breadth, flows, and style.
From late April into mid-May, A-shares were not recovering in a straight line, and they were not weakening in a straight line either. They were rotating between several lines: STAR, semiconductors, ChiNext, Beijing small caps, and large-cap benchmarks each gave a different answer.
What to Watch
The following is an observation framework, not a trading signal.
- Whether breadth follows the index. If the index rises while advancers weaken, the rally is narrowing; if advancers expand with the index, the move is broadening.
- Whether STAR and ChiNext move together. If the two growth benchmarks split, risk appetite is uneven; if they move back into alignment, growth has more internal consistency.
- Whether semiconductor flows persist. A single day of inflow or outflow is only one print; persistence matters more than the one-day number.
- Whether turnover confirms the move. A rise on expanding turnover and a rise on shrinking turnover are different pictures; volume shows how much participation sits behind the price change.
Data sources: SSE Composite, STAR 50, ChiNext, Shenzhen Component, and BSE 50 index data; Shanghai-Shenzhen-Beijing A-share advance-decline counts and turnover; market-wide large-order flow; semiconductor sector return, breadth, and large-order flow, all sourced from Eastmoney public market-data and fund-flow APIs (queried 2026-05-26; trading day 2026-05-15).