MONTERREY, MEXICO — Gruma S.A.B. de C.V. on Oct. 1 said it received a one-day extension to complete paperwork for an agreement to convert $738.3 million of derivatives into bank loans.

"The corresponding banks continue to carry out their procedures for definitive authorization," Gruma said in an Oct. 1 filing with the Securities and Exchange Commission. The company last week said it had a Sept. 30 deadline to file its paperwork.