So the traders at my firm broke down into 3 categories and this mix is really interesting because it encapsulates the breakdown I think of the entire industry. The first group we had were option market makers (screen based). These guys had an edge. Most (not all) made money. I don't have an exact number and I did not run or manage this group but was good friends with the guy who did. I did know that they drove the p&l of the firm. They had an edge and they consistently made money day in and day out. I should point out that in fairness, they were not killing it. They were getting eaten alive in overhead cost. They had to pay over 12k a month for a seat and we took 20% of their p&l. Their software cost were also around 1k a month. So they made money, but you won't be reading about them anytime soon.
The second group were the ones managing small funds. They made money from the fees and from a cut in the p&l but I should point out, these guys did not have to take big risks and use leverage. The could leverage their money under management vs risk. So in other words they could execute low risk strategies making 10% a year and pull in 7 figures from that vs Johnny daytrader with a small account going all in every day with 50% swings in his account.
The 3rd group were the independent traders. They deposited money and they could trade stocks, options or futures. They could trade overnight, intra-day, whatever they wanted. Most of these guys had no edge and almost none of them made money. Oh they tried. They threw everything including the kitchen sink at the market. In the end as their account values dropped their leverage increased. They would take on more and more risk to try to make back their losses. They would often confuse market environment with edge. In other words like I mentioned earlier, selling options in a rising market or just being long stocks in a rising market and thinking, "look, I found something that works".
So to sum up. The MMs who had an edge for the most part made money. The guys running funds made money but only because they did not have to over leverage and could earn the fees, the independent guys with no edge for the most part lost money. And this is pretty much the breakdown we have overall. We have the flow traders in the industry, the money managers and the guys on their own with nothing. I guess nodoji is in her own little group.