If we assume that WT has a billion in investable assets, (they have much more in total assets), and we assume
a realistic average return of 5% (they DO invest) that means they get at least $5 million in earned interest
every year
1,000,000,000 X 0.05 = $50 million per year
And if you've got $1 billion, and you're only getting 5%, it's time to look for a new investment manager.