I find this formula for an op-amp written in a book:
Unity Gain Bandwidth=A*Fo
Where, A is the open loop gain of the opamp
Fo is the break frequency
What I inter from this expression is that the open loop gain of an apamp is generally defined at break frequency. But I could not find it written explicitly. I did not want to make any conclusion without being sure. Can someone tell if what I infer is correct?