King Slide, the server rail maker, jumped to its daily limit and briefly took the crown as Taiwan's most expensive stock — good news for its shareholders, less so for holders of long-time leader Aspeed.

• King Slide opened higher and ran straight up to its daily price cap.
• Aspeed, the previous top-priced stock, slipped more than 2% at one point before recovering.
• That gap let King Slide pass Aspeed intraday and take the No. 1 spot for a short stretch.
• Aspeed clawed back most of the drop, so the two ended up trading close together again.
• The AI server buildout is what is driving demand for King Slide's rails, and the market is pricing that in hard.

Outlook: The two are close enough that the top-stock title will likely keep flipping back and forth day to day.