Originally posted by vladiator
You are right but for the wrong reasonThis approach might have phsychological side benefits. But those aren't the main reason to do it. The main reason is it reduces the volatility. In theory it is irrelevant if you can tap on additional resources. In practice, the volatility of your account size matters.
You can also look at it from a different angle, although it may not seem relevant at first. But bear with me for a sec.
The main reason academics (and practitioners alike) argue one should diversity is to reduce the volatility. In this case, you are looking at diversification <b>over time</b> as opposed to the usual <b>accross assets</b> look. In other words, if you have a strategy where you take a position in some security and close it later to roll over into the next position, you might on average have a profit of some percentage. BUT, that doesn't mean you'll ever get there b/c the volatility of outcomes may take you out. By scaling in/out you reduce the variability of final outcomes and by making the distribution tighter are more apt to get that average return.
Brother,
Smoothing out your equity curve reduces volatility in your trading account. You are just spinning my idea around. Dont underestimate psychological benefit. We are human beings not robots.
--MIKE
This approach might have phsychological side benefits. But those aren't the main reason to do it. The main reason is it reduces the volatility. In theory it is irrelevant if you can tap on additional resources. In practice, the volatility of your account size matters.