This happens on occasion. Essentially, the plaintiff’s expert witnesses had flawed testimony about the actual financial damage done. The judge didn’t know this would happen until after they testified. The judge also said that the only issue was the dollar figure. In other words, the evidence of price fixing was conclusive enough.
I suppose this will go to new other jury trial, and the plaintiff’s will present better expert witness testimony. What will the new dollar amount end up at? We have no idea.