Another answer lies in shifting investor expectations of market shocks, five years after the U.S. "flash crash" that briefly wiped out nearly $1 trillion in market value and seven years after the subprime crisis pushed investment bank Lehman Brothers into bankruptcy and redrew the financial landscape.
Take context from the input text and decide on the accurate relationship between 'Lehman Brothers' and 'investment' from the options provided.
Options: brand, founded by, industry, owner of