Towards Realistic Financial Time Series Generation via Generative Adversarial Learning

Training network models to accurately respond to market fluctuations requires access to vast amounts of data. Data availability is strictly bound to the market's evolution, which updates only on a daily basis. In this paper, we propose several solutions based on Generative Adversarial Networks for providing artificially generated time series data with realistic properties. The main challenge here is the specificity of the target data, which has properties that are difficult to control and have wide variations in time, e.g., central moment statistics, autocorrelation or cluster volatility. Another contribution is in assessing the quality of synthetic data, in general, as there is no standard metric for this. Experimental validation is carried out on real-world financial data retrieved from the US stock market.