The Qatar Exchange 20 Index fell 0.51% to 9,618.26 on Monday as shares lost across the board. Shares of Gulf Warehousing Co. or GWC closed unchanged at QR40.10. Earlier in the day, the logistics company said it has signed with Qatar Fuel Additives Company an agreement whereby GWC is contracted to handle QAFAC's offsite storage of chemicals and general cargo. The agreement also includes scope for document storage and records management services. "It must be noted that the term of the agreement is three years, the type of the agreement is a (call-off) agreement, and the estimated value of the agreement is six million Qatari Rials during the full three-year period," said the filing to the Doha-based bourse.