NFA is the National Futures Association. Nuclear fusion refers to a form of nuclear reaction in which two lighter nuclei combine to form a heavier nucleus and an extremely light nucleus (or particle).

The National Futures Association (NFA) is a non-commercial independent institution engaged in futures and foreign exchange trading in the United States, and it is a non-profit membership organization.

Nuclear fusion is also called nuclear fusion, fusion reaction, fusion reaction or thermonuclear reaction. Nuclear fusion is the combination of light nuclei such as deuterium and tritium to release a lot of energy, and then two nuclei form a heavy nucleus, such as helium.