Take context from the input text and decide on the accurate relationship between 'Lehman Brothers' and 'investment bank' from the options provided.
Options: distributed by, product/material produced, industry, founded by

The civil charges against the veteran money manager, his son and their investment company come eight months after the Reserve Primary Fund, loaded with Lehman Brothers debt, halted redemptions after the investment bank declared bankruptcy, sparking a run on money-market funds.
product/material produced