 
 <prompt> Wetin investment banks and hedge funds dey use? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Others don talk say dem no do plenty of dis kain loans wey fit cause crisis wey big like dis. For one article for Portfolio Magazine, Michael Lewis yarn with one trader wey talk say "There no plenty Americans wey get bad credit wey dey collect bad loans wey go satisfy investors wey dey find the final product." Basically, investment banks and hedge funds use financial innovation make dem fit make big bets wey pass the real value of the mortgage loans wey dey under, using derivatives wey dem call credit default swaps, collateralized debt obligations and synthetic CDOs. 