In ETF land, the 12-month yield on the iShares S&P National AMT-Free Muni Bond (NYSEARCA:MUB) is just under 3%. A New York Times article titled " Why Many Retirees Could Outlive a $1 Million Nest Egg " said: "For people close to retirement, the problem is acute. But under current conditions, if they spend that $40,000 a year, adjusted for inflation, there is a 72 percent probability that they will run through their bond portfolio before they die."