You've discovered the dirty laundry of the patent system. There is no burden to prove your invention actually works. Some people might argue this isn't a problem since no one would want to infringe on a technology that doesn't function. However where this breaks down is when the patent gets an overly broad claim. So to answer your question, I'm not sure if ...
There are many many patents with the term "value-at-risk" in the tile or body. From google patents -
The oldest one
System and method for determination of incremental value at risk for
securities … EP US JP AU CA US5819237A Mark B. Garman Financial
Engineering Associates, Inc. filed 1996-02-13
The most recent
US10277525B2 Method and apparatus ...