"Choses in Action" are particularly crucial to the assignment of interests in law, and thus play a crucial role in the operation and coordination of the financial markets. Certain rights, such as a claim to rescission of a mortgage is a right of action, but "not" a "chose in action" or part of one that can be assigned. Because the category is often broadly construed, there have been numerous attempts to expand the category to allow new intangible assets to fall within the chose in action.