Asian stock markets turned in a mixed performance on Monday as investors took a closer look at artificial intelligence-related bets across the region. Trading reflected a more selective mood, with some markets pressured by concerns that parts of the AI trade may have become too expensive.

South Korean shares were among the weaker performers, as worries over stretched valuations in AI-linked names weighed on sentiment. The move suggested that investors are becoming more cautious about how much future growth is already reflected in stock prices, especially in markets with strong exposure to technology themes.

Chinese stocks, by contrast, outperformed, helped by optimism tied to domestic artificial intelligence developments. That stronger showing highlighted a shift in investor focus toward markets seen as having fresh catalysts, even as broader enthusiasm for AI is being reassessed.

The uneven session underscored how the AI narrative is no longer lifting all regional equities in the same way. Instead, investors appear to be separating markets and sectors based on valuation, domestic momentum, and confidence in local growth drivers.