Margins for the first month of the Texas Gas Zone SL basis swap futures contract will increase to $500 from $75 for clearing members, to $550 from $83 for members, and to $675 from $101 for customers. Margins for all other months will increase to $200 from $50 for clearing members, to $220 from $55 for members, and to $270 from $68 for customers.
Margins for the SONAT Louisiana basis swap and Transco Zone 4 basis swap futures contract will increase to $125 from $75 for clearing members, to $138 from $83 for members, and to $169 from $101 for customers.
