It’s a proven way to get in on a closed-ed fund before its next huge surge: watch for the managers to buy shares of the fund with their own cash — then dive in right alongside them, asserts Michael Foster, income expert and editor Contrarian Outlook.

I’m telling you this now because one of the smartest minds on Wall Street just dumped a pile of his own money—$2.6 million, to be precise—into one of the funds he personally manages. Such a brazen move by an insider is one of my favorite buy signals.

I’m talking about billionaire Mario Gabelli, who has been managing money for investors since founding his own firm, GAMCO Investors, in 1976. Gabelli’s tendency to put his own cash into his funds is great for investors like you and me because it ties his interests directly to ours. And of course, the fact that his stock picking has made him personally very rich is another reason to keep him on your radar.

Gabelli obviously knows when something is absurdly cheap—especially when it’s his own fund! That’s undoubtedly why he bought over $2.6 million worth of shares in the Gabelli Global Utility and Income Trust (GLU). This can be considered a sleeper fund with just $326 million of assets.

So what’s so good about GLU, and why is Gabelli buying it now? Let’s start with that huge 7.1% dividend, which has been rock-solid, holding fast since 2011, while many other high-yielding stocks and CEFs have cut their payouts. That’s because GLU holds a bevy of utilities that Gabelli picked up at great prices. In turn, these companies have been steadily hiking their own dividends.

But the real beauty of the fund is that it isn’t locked into utilities. This lets Gabelli go to work in other areas, like telecoms and other proven dividend growers, giving us some nice diversification that helps steady the fund and keep its high income stream safe.

GLU has seen its portfolio steadily rise in the long run. Sure, there was a big dip in 2018, but that was an anomaly. With a decline in its portfolio lasting nearly a full year, this recent weakness has exceeded the five-month dip in 2017 and even the eight-month dip in 2015. This is a clear sign that GLU is oversold and a turnaround is just around the corner.

Finally, there’s one more reason to put this fund on your buy list: the US dollar has soared against foreign currencies over the last year because of the Federal Reserve’s interest-rate hikes, which have gone too far, too fast. Fed Chair Jerome Powell has admitted as much, telling the markets that interest rate hikes in 2019 will be slow, if there are any at all.

That, in turn, will weaken the dollar, boosting GLU’s foreign-income stream. When investors figure that out, expect them to jump in and grab this fund’s safe 7.1% yield.

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