UPDATE 1-Calstrs says monitoring Goldman situation

* Assumes innocent until proven guilty

* Does business through asset management, broker-dealer

BEVERLY HILLS, April 26 (Reuters) - Pension fund Calstrs' chief investment officer said on Monday the fund was monitoring the situation with Goldman Sachs (GS.N), but that it was not altering its business relationship with the bank.

"We'll assume they're innocent until they're proven guilty," said Christopher Ailman, CIO of the California State Teachers' Retirement System, on the sidelines of the Milken Institute Global Conference.

Calstrs has an account with the bank on their asset management side and does some business with them through Goldman's broker-dealer unit, he said.

Fraud charges were recently filed against Goldman by the U.S. Securities and Exchange Commission. The suit charges that Goldman hid vital information from investors about a subprime mortgage-linked security.

(Editing by Bernard Orr)