A
dark brown to black combustible sedimentary rock that is used as a fuel source.
It accounts for the generation of about 55 percent of the total electricity
output in the United States. The United States has 30 percent of the world’s
bituminous and anthracite coal reserves, more than any other country except
China, which consumes nearly all of its own production. Coal futures are traded
on the New York Mercantile Exchange (NYMEX). Coal futures are a relatively new
addition to the NYMEX, with trading beginning only in the late 1990s. Its
trading symbol is QL.