With MPT, you're not necessarily running a business, you're holding securities/assets that cannot have a negative value. (i.e. they can't become liabilities, you can't have a stock or bond that you owe money on)
With a business, the net value can become negative and in some cases when it does, you declare bankruptcy. This is why you'd want to ring-fence/separate out the more risky ventures from your main business, so that it's a separate entity that can rise/fall on its own.
With MPT, you're not necessarily running a business, you're holding securities/assets that cannot have a negative value. (i.e. they can't become liabilities, you can't have a stock or bond that you owe money on)
With a business, the net value can become negative and in some cases when it does, you declare bankruptcy. This is why you'd want to ring-fence/separate out the more risky ventures from your main business, so that it's a separate entity that can rise/fall on its own.
See the case of Target (USA) and Target Canada: http://www.alvarezandmarsal.com/target-canada-co-et-al/