Any bond trader can tell you that overall your model can have zero bias, and a small error term, but your bids that get hit and offers that get lifted are the o

Any bond trader can tell you that overall your model can have zero bias, and a small error term, but your bids that get hit and offers that get lifted are the ones that are "off". This could have been solved with a "human in the loop". Of course, that may have broken the economics of the entire operation.