Share your insights or perspective on the financial matter presented in the input.

Why can't you just have someone invest for you and split the profits (and losses) with him?
Such an offer has negative value, so it's hard to see how it would make sense to accept it. The offer has two components, one part that you gain and one part that you lose. The gain is that half your losses are covered. The cost is that half your profits are lost. For that to be a net benefit to you, you would have to expect that you will gain more from this than you will lose from it. That is, you must expect that the investment has negative value. But if you expect that the investment has negative value, why are you investing? This also doesn't really align incentives between the two parties. The person choosing the investment is not incurring opportunity cost (because they have no funds locked up) while you are. So they have an incentive to be conservative that you do not. For example, say I could make 1% in an ultra low risk CD. The person choosing the investments has an incentive to put me in something that he only expects to make around 0.5% (because he gets to keep half the profits and it costs him nothing). Whereas I'd rather just put the money in a CD (because I get to keep 1% instead just half of 0.5%).