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On a good day, the stock market models I have developed are approximately 75% accurate when backtested against historical data. Also, the data I feed into these models come from the most reliable sources I can find but that doesn't mean that they are bullet-proof. Furthermore, it is the nature of time-series models that no one knows if future performance will mirror the past. Only a charlatan would tell you otherwise. Bottom line is that investors should always exercise critical judgement. As the old Hungarian proverb warns "The believer is happy; the doubter is wise." |