Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Why can't you just have someone invest for you and split the profits (and losses) with him?
This means that if your capital under my management ends up turning a profit, I will keep half of those profits, but if I lose you money, I will cover half those losses. The bold part is where you lose me. This absolutely exists with the exception of the loss insurance.  It just requires a lot more than the general retail consumer investor has to contribute.  Nobody wants to take on the responsibility of your money then split 50% of the gross proceeds of your $10,000 (or whatever nominal amount of money you're dealing with) investment and return it all to you after a year.  And NO money manager will insure that the market won't decline. Hedge funds, PE Firms, VC Firms, Investment Partnerships, etc all basically run the way you're describing (again without your loss insurance).  Everyone's money is pooled and investments are made.  Everyone shares the spoils and everyone shares the losses.  And to top it off, the people making investment decisions have their money invested in the fund.  All of them have to pay rent and accountants and other costs associated with running the fund and that will eat in to the proceeds to some degree; because returns are calculated on net proceeds. With enough money you can buy yourself in to a hedge fund, for the rest of us there are ETFs and other extremely fee-reasonable investment options.  And if you don't think the performance and preservation of assets under management is not an incentive to treat the money with care you're kidding yourself (your first bullet point). I'll add that aside from skewing the manager's risk tolerance toward guaranteed returns I doubt you would fair favorably over the long term compared to simply paying even an egregious 1% expense ratio on an ETF.  If you look at the S&P performance for 10 or 20 or however many years, I'd venture that a couple good years of giving up half of your gains would have you screaming for your money back.  The bad years would put the money manager out of business and the good years would squander your gains.