Quote from Maverick74:
Buying power is irrelevant. No one in the professional world talks about buying power. If I invested 50k in your fund, I care about the variability of your returns, your actual returns on my notional investment and what your daily risk is. Nobody looks at return on buying power. So if I buy a call option for .10 and sell it for a dollar I don't tell people I made a 1000% return as it has no context. Was that ten dollars 100% of my account value or did I buy that call in a 100k account which makes the trade worthless.
So the way to go about this is to use deductive reasoning and work backwards from risk and solve for account equity. Most professional traders risk somewhere between 1% and 2% a day of their capital. How they do that is irrelevant. So if our daily risk is 1000 and we use a 1% threshold, that would solve for 100k in account value. If we use 2% it would solve for 50k.
I have no idea why this is so hard for you to understand. Shit by your definition I make 20,000% a year trading options. Do you think I could market my track record that way? LOL. Of course not. What an investor wants to know is what is their expected return on notional investment as well as the risk that is taken to earn that return. This normalizes the data so that you don't have 10 different traders who trade different products with different margin and over different time frames. By normalizing the data you can make a straight line comparison between different traders. Otherwise how could I accurately differentiate you from an option trader who bets 100% of his equity on selling premium?