There are definitely differences. One is that NNs are trained on training data and then let loose on real world (or testing) data. Markets are always training online. Another is that NNs (are supposed to) approximate a true hidden function, whereas markets are adapting to changing conditions not necessarily to a single underlying truth. But markets do adapt to inputs they haven’t seen before, and there are economic theories describing that process, like adaptive expectations and tatonnement. I suspect that markets are more likely to adjust quite quickly, and also to “forget” old data quite quickly.
There are definitely differences. One is that NNs are trained on training data and then let loose on real world (or testing) data. Markets are always training online. Another is that NNs (are supposed to) approximate a true hidden function, whereas markets are adapting to changing conditions not necessarily to a single underlying truth. But markets do adapt to inputs they haven’t seen before, and there are economic theories describing that process, like adaptive expectations and tatonnement. I suspect that markets are more likely to adjust quite quickly, and also to “forget” old data quite quickly.