JG Summit Holdings Inc., the investment arm of the Gokongwei family, reported a 37 percent decline in consolidated core net income to ₱13 billion for the first half of 2026, hit by the sharp drop in Cebu Air Inc.’s earnings following the surge in jet fuel prices during the second quarter.The conglomerate faced further earnings pressure at the parent company level due to higher interest expenses, having absorbed debt from its shuttered petrochemi…