Shares of Taiwanese glass fiber cloth maker Fu Sheng Kung (1815) jumped sharply, briefly hitting the daily limit up — good news for holders who bought the dip, but the crowd is now split on whether to chase it or cash out.

• The stock spiked to its daily ceiling before easing back, still well above last week's high.
• AI server demand is driving orders for high-end electronic materials, including advanced glass fiber cloth.
• Some retail investors say the rally is just getting started and call the pullback a last chance to buy.
• Others are already selling into the strength, locking in quick gains after a fast run-up.
• The stock has round-tripped violently — some traders sold near 60 after buying above 100, only to watch it recover within a month.

Outlook: The next move likely hinges on Fu Sheng Kung's coming revenue figures and whether AI-driven demand for high-end glass fiber cloth holds up.