<p>We all know past performance doesn&rsquo;t ensure future results. The sting of 2002 and 2008 can still be felt by some investors who suffered through these times without well-diversified portfolios.</p> <p>Our recent research shows that 1 in 4 advisors find diversification more difficult to obtain in the current environment. Many disagree about which asset class can actually provide true diversification, with some factions trumpeting real estate and other real assets, while others dig in on fusty corporate and government bonds.</p>