The U.S. investment-grade bond market has offered a sub-3% yield for 14 consecutive quarters, as measured by the Barclay’s Aggregate bond index. No wonder investors have lost interest in traditional higher-rated bonds.

What has caught their attention instead? Asset class “cross-dressing.”

At a time of ultra-low bond yields and more compressed expected equity returns, and while stocks are typically more volatile than bonds, investors are increasingly opting for stocks that are behaving “bond-like” to generate income as well as riskier bonds, which have the side effect of building equity-like exposure – and risk –in their bond portfolio. This approach, however understandable, comes with its own hazards. Here’s why.

Certain income stocks are looking expensive. When it comes to generating income with stocks, many investors have pursued equity sectors that may offer high dividend yields and potentially less price swings than the overall market. Think real estate, telecoms, utilities and consumer staples.

But while many bond proxies, such as utilities and real estate, have outperformed in 2014 given the renewed move lower in interest rates, these historically higher dividend yielding sectors have underperformed the overall market since 2011 amid improving economic activity. In addition, while some of the valuation premium of the bond proxy equity sectors has come off in recent years, they are still somewhat expensive relative to recent history. For example, relative price-to-forward earnings ratios for utilities are at the upper end of their historical range.

Riskier bonds can limit diversification and look expensive too. Meanwhile in the bond market, investors have traded interest rate risk for credit risk during the past few years (and they’ve been amply rewarded for doing so).

While this strategy may limit losses when rates rise again, investors have essentially “doubled up” their equity market risk as they raise allocations to high yield bonds. As my colleague Del Stafford recently wrote, the high yield bond market has a correlation of roughly .74 to stocks. If high yield has similar risks to stocks, investors are surrendering the value of diversification and potentially taking the same bet twice.

Although attractive in a “lower for longer” rate environment, these cross-dressing asset classes are also relatively expensive. And if interest rates eventually do resume their move higher, as I expect, I would be leery of segments of the market that require low yields to justify their valuations. Here are five investing ideas I would focus on instead:

Pursue international and global dividend opportunities. While I’d be wary of seeking income at all costs (i.e. don’t be agnostic to valuations), that’s not to say there aren’t certain market segments that are worth pursuing, especially given that equities continue to look cheaper than bonds.

One segment I believe investors should consider is international and global dividend funds, rather than funds focused exclusively on U.S. dividends. The reason: U.S. dividend funds look the most expensive, and dividend yields in the United States are low compared to those in the rest of the world (stay tuned for more on this potential opportunity in an upcoming post). In addition, I also like the global financials and technology sectors for their cyclical exposure and relatively inexpensive valuations, and dividends have grown especially fast in these sectors as well in recent years.

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