> An exchange marketplace shouldn't be in this position unless they are also participating in the market directly or indirectly through funds, their own and the customers' funds.
Yes, although the limitation with this line of thinking is that in most market-related activities (including running an exchange) it's hard not to be structurally long the market in various important ways. For example as an exchange your commissions are going to be highly correlated with market activity and may also be per unit in some cases and so would be directly correlated with market prices in that case.
As a second-order effect, customers' trading limits are going to be affected as prices fluctuate even if you don't directly offer margin yourself, because not only does the value of the thing they've deposited with you change and therefore affect how much other stuff they can sell this for but also they may have made that deposit by pledging collateral elsewhere and borrowing against that to create margin so that margin loan will be affected.
You can definitely try harder to avoid the problem than FTX though which seems to have been pretty much all-in on it's own illiquid token (FTT) and Alameda using leverage on FTT as their main source of funding. One of the things I learned at Goldman during the crisis is that you can't rely on a mark for anything illiquid - you have to have a real liquid market price.
Yes, although the limitation with this line of thinking is that in most market-related activities (including running an exchange) it's hard not to be structurally long the market in various important ways. For example as an exchange your commissions are going to be highly correlated with market activity and may also be per unit in some cases and so would be directly correlated with market prices in that case.
As a second-order effect, customers' trading limits are going to be affected as prices fluctuate even if you don't directly offer margin yourself, because not only does the value of the thing they've deposited with you change and therefore affect how much other stuff they can sell this for but also they may have made that deposit by pledging collateral elsewhere and borrowing against that to create margin so that margin loan will be affected.
You can definitely try harder to avoid the problem than FTX though which seems to have been pretty much all-in on it's own illiquid token (FTT) and Alameda using leverage on FTT as their main source of funding. One of the things I learned at Goldman during the crisis is that you can't rely on a mark for anything illiquid - you have to have a real liquid market price.