Nonvolatile latches are increasingly popular with the advent of IoT design. We study the yield energy tradeoff of the backup mechanism of an STT-MTJ based nonvolatile latch. For the yield analysis, we rely on Hicks and Wheeling methodology for multi-cone radial sampling for the purpose of rare fail estimation. Yield is shown to be delimited by the Parallel-to-AntiParallel magnetic angle transitions. To accommodate for the slower cells, we note an increase in the average energy requirements for the backup mechanism. Simulations indicate an increase of 10%-40% for the average energy requirements to achieve an ideal yield requirement close to 99% for different number of components.