MONTERREY, MEXICO — Gruma S.A.B. de C.V. on Aug. 24 received another extension with its banks to cover $726.6 million in derivative losses.

The deadline was extended to Sept. 21 from Aug. 24. The deadline now has been extended three times since June to allow Gruma to refinance 3,367 million pesos ($255 million) in existing loans and receive board approval.