{"iri":"http://fasb.org/us-gaap/2026#DerivativeUnderlyingBasis","label":"Derivative, Underlying Basis","definition":"Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu).","license":"https://accountingfoundation.org/page/pageContent?pageId=/Termsofuse/Termsofuse.html","source":"gaap","source_url":"http://fasb.org/us-gaap/2026#DerivativeUnderlyingBasis"}