Kingboard Laminates (1888.HK) tumbled 3% during regular trading on Monday to HK$35.98, with the steepest leg of the decline unfolding within a five-minute window.

The drop extends a weak run for the printed-circuit-board materials supplier, which has shed roughly 11.5% over the past week. After opening Monday at HK$42.14, the stock quickly retreated and hit an intraday low of HK$35.06 before paring losses modestly into the close.

Kingboard Laminates has underperformed Hong Kong's benchmark index by about 13.7 percentage points over the past five sessions, signalling persistent near-term selling pressure.