Because there is no black and white answer if you qualify as a trader. If you don't elect MTM, the benefits are minimal. One such benefit is Home Office. There is no black and white for that either. For many the risk and hassle of it is not worth the benefit. And Robert Morse is completely wrong.I see Investor is the number one answer so far. If you do qualify for Trader Status, what reason's are there for keeping Investor status?