Hooves I have made my biggest scores ever on closing biased tracks and probably always will.
Speed biases suck because it the public spots them quickly and only so many horses in a given race posess the speed to make the lead in a race and it limits the potential outcomes.
The public is far less intuitive to catch onto a closing bias or dead rail(which is usally he cause of a closing bias) and when they do its often real late in the day.
The public has a harder time seeing a race unfold on a closing bias and a harder time accepting that the "best horse" with speed will just quit on sheer faith in the bias.
I salivate at those closing biases because the even running style horses who draw the outside of a potential speed mixup go off at overlaid prices and jockeys cant do much to avoid a bad rail if they have drawn inside with frontrunners. Its harder to outthink a closing bias or dead rail. Speed horses tend to take the most cash as well.