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.
Refer to the input text as context and select the correct relationship between 'Lehman Brothers' and 'investment' from the available options.
Options: industry, brand, founded by, owner of