CIG's stock experienced a sharp decline of 8.82% during intraday trading, reflecting significant selling pressure.

The drop followed the release of first-quarter 2026 financial results from Eoptolink Technology Inc., Ltd., a major player in the optical module sector. While Eoptolink reported strong year-on-year revenue growth, its net profit fell short of market expectations, declining quarter-on-quarter primarily due to a significant surge in financial expenses.

Market analysts had anticipated a higher net profit range for the quarter based on full-year projections. The actual reported figure was below these estimates, leading to negative sentiment that impacted CIG's share price.