Should You Invest in Exchange Traded Funds? There are thousands of ETFs available. Should you invest in them? Related Content My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. How Retirement Spending Changes With Time It can be difficult for clients to imagine how much they’ll spend in retirement. This short, insightful article is useful.