While systemic risk—the risk of wholesale failure of banksand other financial institutions—is generally consideredto be the primary reason for supervision and regulation of thebanking industry, almost all regulatory rules treat such risk inisolation. In particular, they do not account for...

Historically, nonfinancial corporations relied on performance targets linked to their EPS. Up until the 1970s, banks also appeared to follow a similar practice, but since then they have favored ROE. Equity investors seem to be aware of these differences because EPS growth is better at explaining...