abstract = "Genetic Network Programming (GNP) is an evolutionary
computation which represents its solutions using graph
structures. Since GNP can create quite compact programs
and has an implicit memory function, it has been
clarified that GNP works well especially in dynamic
environments. In this paper, GNP is applied to creating
a stock trading model. The first important point is to
combine GNP with Actor-Critic which is one of the
reinforcement learning algorithms. Evolution-based
methods evolve their programs after task execution
because they must calculate fitness values, while
reinforcement learning can change programs during task
execution, therefore the programs can be created
efficiently. The second important point is that GNP
with Actor-Critic (GNP-AC) can select appropriate
technical indexes to judge the buying and selling
timing of stocks using Importance Index especially
designed for stock trading decision making. In the
simulations, the trading model is trained using the
stock prices of 20 brands in 2001, 2002 and 2003. Then
the generalisation ability is tested using the stock
prices in 2004. From the simulation results, it is
clarified that the trading rules of GNP-AC obtain
higher profits than Buy and Hold method.",
notes = "CEC 2007 - A joint meeting of the IEEE, the EPS, and
the IET.