Hang Seng Tech Index Up Over 2%, A-Share STAR 50 Bucks the Trend
Miles Bennett
On July 7, the Hang Seng Tech Index surged over 2% intraday — Meituan up 6%, Tencent up 4% — reversing an early dip, while A-share benchmarks slid broadly but STAR 50 rose over 1%, led by semiconductor wafers and PCB names.
Hong Kong opened low then rallied — where did the money go?
The Hang Seng Tech Index widened gains to over 2% intraday. Meituan rose more than 6%, Tencent more than 4%, a sharp reversal from the early sell-off.
The broader Hang Seng Index gained 0.46%, confirming a buy-the-dip pattern.
This means → capital tested the downside at the open, then quickly rotated back into tech leaders mid-session — a sign of firm buying intent.
A-shares fell broadly — so why did STAR 50 buck the trend?
The Shanghai Composite slid as much as 1%, the Shenzhen Component lost 0.70%, and ChiNext dropped 0.60% — all three major benchmarks under pressure.
STAR 50 rose over 1%, the only major broad-based index in the green.
This means → the market wasn't uniformly bearish. Money rotated out of traditional heavyweights and into hard-tech names — semiconductors above all — and STAR 50 is effectively the proxy index for that chain.
Why did semiconductor wafers and PCBs suddenly lead?
Semiconductor wafer stocks — wafers are the thin silicon discs that form the base material for chip fabrication — rallied hard: YouYan Silicon hit the daily limit, Shanghai Hecong rose nearly 10%, with Zing Semiconductor and TCL Zhonghuan following.
The catalyst is price hikes. A Caitong Securities report noted that Shin-Etsu, SUMCO, and GlobalWafers have raised prices twice this year. Standard 12-inch wafers are up 5%–8%; high-end wafers for AI/HPC applications are up 18%–22%, with cumulative year-to-date increases exceeding 15%.
PCB stocks rallied in tandem — Guanghua Technology, Tianhai Electronics, Wellgao, and Nord Shares all hit the daily limit. Kingboard Laminates issued another price-increase notice on July 6: FR-4 and PP up 15%, CEM-1/22F up 10%, citing tightening supply of upstream glass cloth and copper.
In plain terms = the logic is the same for both chains — upstream raw materials get more expensive, material makers' profit expectations rise, and share prices follow.
What do lab-grown diamonds have to do with AI chips?
Lab-grown diamond stocks surged: Huifeng Diamond up over 10%, Yeguangming up over 25%.
The thesis from Soochow Securities: diamond material has ultra-high thermal conductivity and low thermal expansion, making it a potential next-generation heat-dissipation solution for high-end AI chips. Nvidia's Rubin architecture is the near-term catalyst.
This means → the market is not trading "diamond jewelry." It is trading the prospect of diamond as a thermal-management material inside AI chips — a thesis that remains unproven.
What fell? Why are precious metals and memory chips weak?
Precious metals opened sharply lower. Zhaojin Gold hit the daily down-limit; spot silver broke below $61/oz, spot gold below $4,140/oz.
Memory-chip names pulled back — GigaDevice fell nearly 6%. Petrochemical, shipping, and pharma sectors led the decline; coal and oil-chem names also adjusted.
In the bond market, most treasury futures slipped. The 30-year benchmark edged up 0.08%, the 2-year fell 0.01%. Commodity futures diverged: stainless steel, eggs, and soybean meal gained over 1%; silver, caustic soda, asphalt, and glass fell over 1%.
What to watch into the close?
Whether Hong Kong tech's intraday rebound holds through the closing bell is the key test for confirming the buy-the-dip thesis.
On the A-share side, watch whether the divergence within STAR 50 and the semiconductor chain narrows — if only wafer and PCB names rally while the rest keep falling, it signals selective bets, not a broad sector move.
Content is for reference only, not financial advice.