Applying reinforcement learning in finance
If we need to reiterate RL's promise, it is to obtain policies for sequential decision making to maximize rewards under uncertainty. What is a better match than finance for such a tool? In finance:
- The goal is very much to maximize some monetary reward,
- Decisions made now will definitely have consequences down the road,
- Uncertainty is a defining factor.
As a result, RL is getting increasingly popular in the finance community.
To be clear, this section will not include any examples of a winning trading strategy, well, for obvious reasons: First, the author does not know any; second, even if he did, he would not tell that in a book (and no one would). In addition, there are challenges when it comes to using RL in finance. So, we start this section with a discussion on these challenges. Once we ground ourselves in reality, then we will proceed to defining some application areas and introducing some tools you can...