We’ve talked before about the theory that paying investment bankers in stock gives them an incentive to maximize the volatility of their businesses, which is a thing that some people don’t want so much. This starts from the notion that in a 10 or 20 or 30:1 levered bank or broker-dealer or futures merchant, the bulk of the money at risk belongs to the creditors, whether unsecured or depositors or repo or ex-wives or whatever. So it’s plausible to think of the equity as an at-the-money option to buy the assets from the creditors. And as any Level I CFA test completer could tell you with approximately 70% probability, the value of an option increases with volatility. If you own the equity in a bank with $29 billion in debt and $1 billion in equity market value, then you’ll prefer equally likely payoffs of [$25, $35 billion] to payoffs of [$29.99, $30.01 billion], because the higher volatility payoff increases the expected value of the equity (which, after all, can’t go below zero). If, however, you are a creditor of that firm, your preferences are the opposite.
This is all pretty straightforward and orthodox, and it probably ought to inform how you think about the incentives to bankers from owning their bank’s equity, and if you think that way then maybe you come up with ideas like “pay them in CDS” or whatever. On the other hand this theory shouldn’t be taken too seriously. When your entire net worth is in Jefferies stock, “the equity can’t go below zero” isn’t all that comforting.
But it’s worth remembering that incentives from owning equity are not exactly the same as incentives from being paid in equity: people who have a lot of stock feel different from people who stand to one day get a lot of stock. That’s the interesting takeaway from this weekend’s DealBook piece about the fact that bank stocks sometimes go up. (And sometimes they don’t.) For example:
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