KB Laminates (01888) surged 5.01% during Wednesday's intraday session, extending its oversold rebound as positive earnings guidance and a bullish analyst rating bolstered investor sentiment.

The rally was driven by the company's earlier profit alert, which forecast first-half net profit to exceed HK$2.8 billion—representing year-over-year growth of more than 200%. The strong performance was attributed to tight supply conditions across copper-clad laminates and upstream materials including electronic fiberglass yarn, electronic fiberglass fabric, and copper foil, which led to both price and volume increases. Citi reaffirmed its Buy rating on the stock with a target price of HK$130, noting that the recent decline appeared excessive given the company's valuation of only 8-9 times earnings.

Adding to the positive momentum, KB Laminates is scheduled to release its formal interim results on August 24 and will consider an interim dividend, providing a near-term catalyst for the stock. The broader PCB sector also showed signs of recovery, with sector peer Kingboard Holdings gaining ground in the same session.