Selling stuff you’re not even using on eBay or Amazon can be surprisingly profitable.  Not only do you get tax-free income, but you can spend less on housing and utilities because you don’t have to store all that stuff anymore.  Many people that start out selling on the internet just to get rid of their junk find it is so easy they open a side business doing it.
In equity valuation, residual income represents an economic earnings stream and valuation method for estimating the intrinsic value of a company's common stock. The residual income valuation model values a company as the sum of book value and the present value of expected future residual income. Residual income attempts to measure economic profit, which is the profit remaining after the deduction of opportunity costs for all sources of capital.
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