The chain of events which led to the collapse of Barings, Britain's oldest merchant bank, is a demonstration of how not to manage a derivatives operation.
There is one correct way on how to manage a derivatives operation. 
The passage does not say how you manage one. It says that the way the bank handled it is just an incorrect way. This does not imply how many ways would be correct. There is no way of knowing from this pasage alone. The ai might not have took this in consideration. 
( z1 way :quant 1 :ARG1-of ( z2 correct ) :manner-of ( z3 manage :ARG1 ( z4 operate :ARG1 ( z5 derivative ) ) ) )