NEW YORK (Reuters) - Morgan Stanley recommended investors buy Lehman Brothers LEH.N shares, setting a price target of $31, after the beleaguered investment banking firm's stock fell nearly 11 percent on Monday, owing to rumors that it would be bought out well below its current price.
In the context of the input sentence, determine the relationship between 'Lehman Brothers' and 'investment'.
Options: owned by, industry, stock exchange, location of formation