Savings are a leakage from the income expenditure stream because they drain on the economy

Net Working Capital

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It grows tax deferred. If you take an income stream or annuitize the annuity, the money is taxed as ordinary income.

Stocks that pay dividends are a stream of income for common stock holders. Dividends are paid out either quarterly or yearly. The level of dividend is determined by the company as an incentive to purchase stock.