As noted, finishing the wood front and back and to a lesser extent
all around the edges can be done to minimize cupping. That is not
to say that HAS to be done on any particular floor, only that it
will help prevent a problem.
Proper installation will help, including the proper sort of
moisture barrier underneath if the floor is over a
crawlspace or unheated basement.
The other thing that can be done is to control the humidity
in the house using humidifiers/dehumidifiers as the necessary.
Typically cupping occurs because of a moisture gradient in the
wood as moisture diffuses in or out one face faster than
the other face., though wood that is flat at one value
of relative humidity may be cupped at a different value
even after it has time to stabilize. Depends on the wood,
not necessarily on jsut the species but also how the tree
grew (reaction wood) how fast it grew, how big the trunk
was when it was cut, how it was cut (quartersawn is most stable)
If you keep the relative humidity constant, the wood should