Much of the research on quantum algorithms that may have applications to AI is centered on quantum machine learning (QML).
While I'd argue there are quite a few hypothetical reasons that QML could be used in machine learning some time in the future, QML research is in its infancy relative to classical machine learning research and its practical benefits ...
I am afraid that under current state of development, quantum computers cannot be massively deployed in finance industry. However, the area is developing rapidly.
You can find some overview of possible quantum computers application in finance here: https://www.sciencedirect.com/science/article/pii/S2405428318300571