Is there a reason why you pegging 20% ROE and not any other number?
Anyone who can reliably produce 7-10% ROC with a Sharpe of 0.7-1 is doing OK, IMHO, especially if they are completely de-correlated from the main risk factors (equity and bonds).
I use average 20% annual as a personal minimum target/goal for each year. Selected this as passive long term investing gives 10% annually and that is to slow to grow ones capital. If one start with $10,000 it will take decades to get somewhere (= reach $1 mil). With 20% annually one will double the account every 3.5 years, and that is even conservative and slow.
