New derivative rules requiring daily posting of two-way variation margin on affected derivatives could create uncertainties for structured finance transactions, warned Fitch Ratings in a recent analysis. U.S. banking regulators and the Commodity Futures Trading Commission have adopted the uncleared swap margin rules for covered swap entities. Specifically, registered swap dealers and all end users of derivative contracts must comply with margin collection, posting, segregation, and documentation requirements by March 1, 2017. New swaps executed after the 2017 effective date would...