Individual traders in the futures and options (F&O) market witnessed an aggregate loss of Rs 1.8 lakh crore in aggregate losses over the past three financial years. Over 93 per cent of more than 1 crore investors, or nine out of 10 traders, incurred average losses of Rs 2 lakh each, according to the latest study by the Securities and Exchange Board of India (Sebi) released on September 23.