Gone4Good
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
- Joined
- Sep 9, 2005
- Messages
- 5,381
If you only had 3-4 years worth of data, you could potentially miss on bull/bear market cycles because you may not have noticed them to begin with.
I'll bite, once more.
The U.S. business cycle averages about 7 years. By your reasoning, the last 30 years only has 4 independent periods by which to judge the next 7 years. We therefore shouldn't have enough information to judge the business cycle. In fact, you seem to be arguing that the past 30 years doesn't have enough information to even see it because we, after all, only have 4 data points.. And yet, I can look at the last 30 years and not only see that a business cycle clearly exists, but I can also deduce pretty accurately its average length, and severity.
Following your argument to its next step; 30 years of data is no better in forecasting a 7 year economic period than 4 years of economic data is in forecasting a single year. That is clearly not true.