What is the relationship between 'Bear Stearns' and 'investment' in the context of the input sentence.
Options: currency, employer, industry, member of

In the wake of the Fed-engineered buyout of stricken Wall Street investment bank Bear Stearns in March, Paulson has urged quick action to give the Fed a permanent authority to make liquidity available to a broader range of financial institutions when financial system stability is threatened.
industry