Indicate a text span in the passage about which an inquisitive question is asked. (note, don't answer the question).
Q: Sentence: Financial Corp . of Santa Barbara filed suit against former stock speculator Ivan F . Boesky and Drexel Burnham Lambert Inc . , charging they defrauded the thrift by concealing their relationship when persuading it to buy $ 284 million in high - yield , high - risk junk bonds .<sep>Question: What are the laws related to this area?
A:
concealing