The 45% drop in the US equity markets has caused even stalwarts to question the wisdom of the "buy and hold" strategy. But rule-based approaches for deciding when to buy or sell suffer the same problem. Sometimes they work and sometimes they don't. In this presentation, Dr. Mike Bowles shows how familiar data-mining tools can be used to derive a robust algorithmic trading system.A simple rule-based approach trend-following system serves as a starting point. He looks at that system's characteristics and then employs a neural net to predict which of the system's trades should be taken and which ones should be skipped.Bowles demonstrates that this significantly improves the performance of the trading system (Sharpe's ratio of 1.6 to Sharpe?s ratio 3.6). This example illustrates one way in which data mining tools have proven useful to practitioners of quantitative finance.moreless
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