overmargin

Noun

 * 1) The amount by which something is bigger, stronger, or with greater capacity than the absolute minimum.
 * 2) The upper rim or border of something.
 * 1) The upper rim or border of something.
 * 1) The upper rim or border of something.
 * 1) The upper rim or border of something.

Verb

 * 1)  To invest too much on margin, increasing risk and limiting operating capital.