We have seen it for several years now: foreclosure sales—there were 5 million since the peak of the housing bubble—have become the hunting grounds for investors with two goals: hanging on to these homes until the Fed’s flood of money drives up their value; and defraying the expenses of ownership by renting them out. And funds have a third goal: collecting management fees. Thousands of smaller investors have piled into the game. And so have the giants.

Blackstone Group LP, the world’s largest private equity firm, plowed over $3.5 billion into the housing market, according to Bloomberg, to gobble up 20,000 vacant and foreclosed single-family homes. It just fattened up a credit line to $2.1 billion to do more of the same. Colony Capital LLC, which already owns 7,000, is putting $2.2 billion to work.

Last year, institutional investors made up 19% of all sales in Las Vegas, 21% in Charlotte, 23% in Phoenix, and 30% in Miami. It had an impact. In the latest Case-Shiller report—a three-month moving average for October, November, and December—home values soared 9.9% in Atlanta, a bigger jump than even during the peak of the housing bubble. Las Vegas popped 12.9%, and Phoenix 23%. It’s getting hotter. In February, compared to prior year, asking prices jumped 14% in Atlanta, 18% in Las Vegas, and 25% Phoenix. Seen from another point of view: in January, the median price of a single-family home in Phoenix skyrocketed 35%.

“We recognized that prices were moving faster than people expected,” explained Devin Peterson, a Blackstone real estate associate, to Bloomberg. Despite that, they’re still “finding opportunities to buy.” They might not be able to rent them out very quickly, but they’d rather not be “missing out on a few points in home price appreciation.” The race to buy is on. The next housing bubble is inflating.

And that’s great. Money—which the Fed hands to its cronies at the frenetic pace of $85 billion a month—magically finds places to go and drives up values, and transactions take place, and paper gets shuffled around, and homes change hands as banks get out from under them, and fees and commissions change hands too. It inflates GDP, which is what everyone wants. And Chairman Bernanke can contort his arm slapping himself on the back.

Trying to rent these places is another story. Housing is zero-sum: when you move into a new place, you move out of the old place at the same time. So it becomes available. And someone else goes through the same process. Only household formation solves the problem of vacant homes—but that takes years or decades.

Best of all, these formerly foreclosed homes have now been pulled off the for-sale inventory list. Hence the “tight” inventory. And they’ve been transferred to the for-rent inventory list where they don’t bother anyone. Except the owners. Colony Capital, for example, with its 7,000 homes, has an occupancy rate of 53%.

Suddenly, the market for single-family rental homes—unlike apartments, which cater to different people—has turned into an elbow-to-elbow affair. The pressure on rents is huge. Year-over-year, rents edged up only 0.5% in Atlanta and dropped 1.7% in Las Vegas. For Phoenix, Bloomberg cited Fletcher Wilcox, a real estate analyst at Grand Canyon Title Agency: median rent per square foot rose 3% year-over-year in February 2011, and 1.5% in February 2012. But in February 2013, it fell 3%.

This tendency was confirmed by others. On the west side of Phoenix, where investors have concentrated their purchases of single-family homes, rents dropped by $100 a month last year, according to James Breitenstein, CEO of Landsmith which has dumped most of its Phoenix properties. He is seeing similar pressures in Las Vegas and Atlanta. “There’s a whole bunch of rental supply that’s coming on that used to be sitting empty in bank portfolios,” he said.

As the Fed’s money is trying to find a place to go, prices may continue to rise: economically unsustainable price appreciation. The definition of a bubble. At some point in the future, not being able to make money on rentals, investors will pull back. Then, the process of a Fed-inspired housing bubble blowing up starts all over again.

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