Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How much lump sum investment in stocks would be needed to yield a target stable monthly income?
I will add another point to ChrisinEdmonton's answer... I recognize that this is perhaps appropriate as a comment--or maybe 1/2 of an answer, but the comment formatting is inadequate for what I want to say.  The magic formula that you need to understand is this:  (Capital Invested) * (Rate of Return) = (Income per Period) When ChrisinEdmonton says that you need $300,000, he is doing some basic algebra... (Capital Required) = (Income per Period) / (Rate of Return)  So if you're looking at $12,000 per year in passive income as a goal, and you can find a "safe" 4% yield, then what ChrisinEdmonton did is:  $12,000 / 0.04 = $300,000 You can use this to play around with different rates of return and see what investment options you can find to purchase. Investment categories like REITs will risk your principal a little more, but have some of the highest dividend yields of around 8%--12%. You would need $100,000--$150,000 at those yields.  Some of the safest approaches would be bonds or industrial stocks that pay dividends. Bonds exist around 3%--4%, and industrial dividend stocks (think GE or UTX or Coca Cola) tend to pay more like 2%-3%.  The key point I'm trying to make is that if you're looking for this type of passive income, I recommend that you don't plan on the income coming from gains to the investment... This was something that ChrisinEdmonton wasn't entirely clear about. It can be complicated and expensive to whittle away at a portfolio and spend it along the way.