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What investments are positively related to the housing market decline?
During the actual decline, there's very little money to be made and a lot to lose. When housing prices tank, everybody loses; the banks are exposed to higher risk of mortgage defaults, insurers start having to pay out more for "gas leaks" claiming over-leveraged homes,    realtors starve because their commissions go down (even as foreclosures put more homes on the market) and people faced with financial uncertainty will stay put in their current homes instead of moving elsewhere. And homebuilders and contractors go broke because nobody wants to spend cash on a new home or major reno that looks like a losing investment. There can be some bright spots. Smaller hardware stores will make money as people do relatively small DIY projects to improve the condition of their current home. The larger stores get this business too, but it tends to be more than offset by the loss of contractor business (FAR more lucrative, and something the ACEs and True-Values don't really get in on). Of course the "grave-robbers" do well; gold buyers, auctioneers, pawn shops, repo firms; these guys eat well when other people are defaulting on loans or have to sell their stuff for fast cash. Most of these businesses are not publicly traded. One thing that was seen was increased revenues at discount retailers like Wal-Mart, Dollar General etc. When things are bad, people in the middle class who had avoided these stores for image or morality reasons learn to swallow their pride and buy discount store brands for half the price of national brand names. That lessens the blow felt by the discount retailers as overall consumer spending decreases; the pie shrinks, but the discount retailers get a bigger slice of the mandatory spending on food, clothing, etc (and the higher-level retailers get it in the shorts). When the pie starts to grow again as consumer spending picks back up, the discount retailers retain their percentage for a while, as the fickle middle class can afford to buy more from the discount retailer but can't yet afford to take their business back to the shopping mall stores. This produces a flatter, "offset" price graph for discount retailers through the business cycle; they don't lose as early or as much as everyone else in a major downturn, and they turn it around sooner while everyone else may still be on the way down, but as everything gets better for everyone on the upswing it's less great for the discount guys, as they start losing customers and their dollars to competitors with better stuff, even as the ones they keep spend more. This doesn't generally manifest as a true negative correlation, but it can be a good hedge. The number one money-making investment in a tanking economy is gold. When things go down the crapper, everyone wants gold, so if you see the train wreck coming far enough in advance, you can make a big move to gold and really make some money off that investment. For instance, when the first whispers about ARM adjustments and mass defaults reached the public consciousness in mid-2005, gold bullion jumped from about $400 to over $700 in a nine-month period. It cooled off again in 06-07 but only to about $600/oz, and then in late 07 it steadily climbed to peak at $1000/oz; even if you got in late, an investment of $1000 in July '07 in "bulk" gold would have netted you $650 in one year; that's a 65% APY. Then the economy hit bottom and a lot of investors ditched gold for investments they thought would pull back out of their holes quickly; For just a little while in '08 gold was down to $700 again. Then came all the government reports; unemployment not budging, home prices still declining, a lot of banks still hiding just how bad their position was. If you had seen that it was going to be bad, bad, bad, like a lot of now-billionaire hedge fund investors did, a $1000 investment in gold in July 05, and then cashing out at the tops of the peaks and buying back in at the major troughs, would be worth almost $4000 today. That's a 400% return over 7 years, or an annual average yield of 57%. There simply hasn't been anything like that in the last 7 years.