Under U.S. GAAP long-duration targeted improvements (LDTI), some non-VA annuity products contain features scoped in as 'market risk benefits' (MRBs), which are required to be measured at fair value. For U.S. insurers, the question becomes 'How does the emerging principle-based reserving framework for non-variable annuities compare to the fair value framework for MRBs under LDTI?' See a comparison between these two new measurement models, highlighting some of the key considerations due to the added complexity of these calculations, to help companies strategically plan for their future state.