There are two types of true real estate investors: Rent Savers and Cashflow Investors. These two groups will enter a real estate market without regard to future appreciation because either the cash savings or the positive cashflow warrant the purchase price of the asset. These people are largely immune to the emotional pratfalls of speculators because the value of the investment to them is not dependent upon a profit to be garnered when the asset is sold. They will hold the asset through any price declines because they are not feeling any pain when prices drop. Since these investors will purchase houses even if prices are declining, they are the ones who move in to create a bottom and end the cycle of declining prices.
In a declining market, a market where by definition there is more must-sell inventory than there are buyers to absorb it, it takes an influx of new buyers to restore balance. Since it is foolish to buy with the expectation of appreciation in a declining market, the buyers who were frantically bidding up the values of properties in the rally are notably absent from the market. With the exception of the occasional knife-catcher, these potential buyers simply do not buy. This absence of buyers perpetuates the decline once it starts. Add to that the inevitable foreclosures in a price decline, and the result is an unending downward spiral. It takes Rent Savers and Cashflow Investors entering the market to provide support, break the cycle and create a bottom.
Rent Savers are buyers who enter the market when it is less expensive to own than to rent. It does not matter to these people what houses will trade for in the market in the future. They are not buying with fantasies of appreciation. They just know they are saving money over renting, and that is good enough for them. Cashflow Investors have a different agenda; they want to turn a monthly profit from ownership. For them, the cost of ownership must be less than prevailing rent for them to make a return on their equity investment. Cashflow Investors form a durable bottom. If prices drop low enough for this group to get into the market, the influx of investment capital can be extraordinary.