The Chicago-based company, which had announced that it was liquidating in "an orderly fashion," said yesterday it would not appeal Amex's decision to remove its stock.
Amex said RII no longer met its financial guidelines.
RII, a real estate investment trust, said it expects its stock will trade via the over-the-counter market after April 26.
State Insurance Commissioner Wayne Metcalf filed the lawsuit Friday in Circuit Court, alleging that Goldman Sachs contributed to the collapse of Investors Equity by causing it to make "illegal" trades in U.S. treasury bonds and bond futures.
Goldman Sachs caused Investors Equity to engage in "extremely risky and unsuitable" trading of as much as $200 million worth of U.S. Treasury bonds a day, Metcalf alleged.
The state's action follows a similar lawsuit against another Wall Street giant. Last month, the state sued Merrill Lynch & Co., alleging that the company's futures trading unit conducted illegal trades that led to more than $8.7 million in losses for the local life insurance company. Merrill Lynch denied the allegation.
The decision by the central bank's policy-making Federal Open Market Committee had been widely expected and left the key federal funds rate that commercial banks charge each other for overnight money unchanged at 5.25 percent.