The Qatar Exchange 20 Index jumped 2.29 per cent to 11,905.94 points on Tuesday, April 1. Gulf Warehousing Co gained the most, finishing 10 per cent (limit up) higher at QAR46.65. Al Ahli Bank recorded the biggest drop, finishing 2.16 per cent lower at QAR49.90. Qatar Islamic Bank (QIB) added 1.90 per cent to QAR74.90. Earlier in the day, QIB revealed that it will publish its results for the first quarter on April 16.