This is an 'adult swim only' kind of market, and investors everywhere are going to struggle

You may not want to hear this but we have to say it again: Don't expect to get outsized returns given today's macro backdrop.

That's according to the latest report by Henry McVey, head of global macro and asset allocation at private-equity firm KKR. He cited high price-to-earnings ratios for stocks, reflecting expectations of higher earnings growth in the future, and low yields on bonds, indicating expectations of low or negative inflation.

"In particular, we just do not see how traditional pensions, endowments, and individual investors are going to meet their historical returns bogeys in a world when $9.9 trillion of liquid fixed income instruments now have a negative yield," McVey wrote.

His conclusion is that 2016 remains a year of "adult swim only," a phrase he coined in a January report. He explained then that today's market conditions are like "swimming at the beach when there is a strong undertow that could pull a less experienced athlete out to sea."

KKRGlobal bonds yields are nose-diving, and the anxiety is real. Thanks to negative yields, many investors are now paying governments for lending them money. The stock market was chaotic following the UK's decision to part with EU, and the dollar became a safe haven. Central bankers are facing heightened pressure to stabilize the situation amid ultralow interest rates, slow global growth, and huge uncertainty.

Here's McVey (emphasis added):

"Our indicators still point to the notion that we are later cycle, volatility is headed higher, growth versus value valuation divergence is extremely wide, and profit margins/returns on capital have peaked. To be sure, we feel better today than in January that the US dollar will not restrict financial conditions as much as it has in recent years, but we remain increasingly concerned about the diminishing impact of monetary stimulus on economies around the world."

KKR

In other words, McVey views quantitative easing by central banks as increasingly ineffective at this point.

He thinks authorities are underestimating the negative impact of QE in developed markets, and that they may have gone too far with their unconventional policy tools.

Business Insider has examined why the negative-interest-rate experiment has been such a failure, especially in the eurozone.

With low global growth rates, the chance of investors generating the same level of returns as they did in the past is low.

That echoes the grim outlook from the McKinsey Global Institute, which concluded that it was the end of the "golden age" of stock market returns.

If those predictions ring true, investors will have to think of more creative ways to get their desired returns.

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