This paper analyzes the welfare implications of banks taking equity st
akes in firms under conditions of imperfect information and moral haza
rd. Two cases of bank control over investment decisions are analyzed.
In the first, the bank does not control the investment decisions of th
e firm. Here, the investment efficiency is higher and bank risk is low
er for an optimal positive level of bank equity holdings. However, in
the case when the bank has veto power over investment proposals by the
firm, there is a trade off between increased investment efficiency an
d increased bank risk.