On June 4, 51World (06651.HK) declined 5.73% in regular trading, trading at 123.0 HKD/share, with trading volume of 278 million HKD. The stock retreated sharply as profit-taking pressure mounted following a cumulative gain exceeding 91% over the past month, with shares having touched a 52-week high of 137.8 HKD.

The pullback was triggered by a convergence of factors. The stock had surged on the back of NVIDIA's Alpamayo 2 Super launch, with 51World positioned as NVIDIA's sole Chinese partner in autonomous driving simulation. However, valuation remains at extreme levels — the price-to-book ratio stands at approximately 63x while net profit remains negative, leaving no earnings support for current price levels.

Simultaneously, the broader Application Software sector came under broad selling pressure, with SENSETIME-W down 3.47%, Kingdee International down 4.95%, Horizon Robotics down 2.45%, and Pony.ai down 1.62%, amplifying bearish sentiment across the board. The combination of overextended short-term gains, unsustainable valuation multiples, and sector-wide weakness collectively triggered concentrated profit-taking.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)