Irene Tse heads the government bond-trading division at Goldman Sachs. For 10 years, she has seen the stock market go from all-time highs to recession levels. Such fluctuations can mean millions of dollars in either prot or losses. \"There are days when you can make a lot, and other days where you lose so much you're just stunned by what you've done,\" says Tse. She says she hasn't slept through the night in years and often wakes up several times to check the global market status. Tse says that she doesn't get much decision making power, which can cause some problems, especially when a deal is time-sensitive