agentsdechange american biography bonds brokers business börsenspekulation economics england) erlebnisbericht finance hedgefund internationalstockmarkets investmentadvisors investmentbank investments newyorktimesbestseller nonfiction nyt:paperback_business_books=2011-07-30 obligations(valeurs) privateequity salomonbrothers salomonbrothers(firm) stockexchange(london stockexchanges technischeinnovation unitedstates wallstreet workplaceculture