As we plan and save for retirement, two pertinent questions arise: What should we invest in? And when should we invest? The first answer we already know – a well diversified portfolio that will increase our risk adjusted return. But the answer to the second question? Right now. And again–as long as we have a well laid out plan and we stick with it, the timing becomes a lot less important to our overall return. Steven Goldberg builds on research done by Vanguard to explain this answer in Why You Should Buy Stocks Today.