Over the past few years, if you&rsquo;ve taken out a mortgage or another consumer loan, you&rsquo;ve probably welcomed the low interest rates you may have received. But as an investor, if you&rsquo;ve kept any retirement savings in fixed-rate investment vehicles, you may have seen low rates in a less favorable light. And that&rsquo;s why it may be time for you take a closer look at your financial strategy for working toward the retirement lifestyle you&rsquo;ve envisioned.