The economy finally seems to be moving steadily in a positive direction, and real estate is a large driver of that momentum. Current market conditions — low mortgage rates, stabilized or increasing home prices and the spring homebuying season — favor a stronger housing sector than we've seen since the recession began.

Before too long, however, we may no longer have the extraordinary supports for the mortgage market that exist now. Mortgage rates may rise, and the housing supply will dwindle, which will ratchet up prices.

But that's tomorrow's market, not today's. For the moment, we still have fantastic interest rates plus a well-functioning mortgage market, thanks to Fannie Mae, Freddie Mac and the Federal Housing Administration. We should enjoy the "good old days" while they last. Here are 11 reasons that borrowers should act now.

1. Mortgage rates will rise

What more can we say about mortgage rates that hasn't already been said? Despite some minor increases, mortgage rates still remain at historic lows. Extraordinary supports from the Federal Reserve, only moderate economic growth here and economic uncertainty abroad are all factors keeping interest rates low. Mortgage rates certainly haven't increased enough to crash the refinance or purchase market, and even if they do continue to show upward movement, there just isn't enough market pressure at the moment to move them upward.

2. Federal Reserve supports will end

Speaking of supports in place to keep rates low, the Federal Reserve has several programs in place to keep downward pressure on mortgage rates. The Federal Reserve replaced its Operation Twist policy of selling short-term debt and buying long-term debt — a kind of money recycling program — with one of outright purchases of Treasuries of up to $45 billion per month. Combined with the Fed's mortgage-backed securities purchasing program of $40 billion per month, the central bank should be able to manipulate interest rates as it sees fit for at least a while. How long the Fed will manage rates is an open question.

3. Home prices are increasing

With a sellers market forming in many areas of the country, homebuyers should act now before prices rise even further. As mortgage rates and home prices move off the rock bottom, you might miss your best chance to get a cheap home at a historically low rate. According to the National Association of Realtors, median existing-home prices increased in many metro areas in the fourth quarter, producing the strongest year-over-year increase in seven years. Continuing low mortgage rates help foster demand, serving to inflate home prices. Consumers should consider moving off the sidelines before prices increase even more.

4. Home sales are increasing

According to the NAR, total sales in 2012 were at their highest level in five years. While existing-home sales did move downward in December 2012, they are nearly 13% above where they were in 2011. Home-sale increases have brought down inventory levels to the point where many homebuyers are struggling to find the perfect home. If strong sales patterns persist, you might find that there are not many suitable homes from which to choose.

5. FHA increasing costs

In order to boost its reserve fund, which was depleted after the housing crash, the FHA has raised costs several times. Most recently, the FHA announced increases to mortgage-insurance premiums, raised credit-score requirements for certain borrowers and even proposed down payment increases on jumbo loans. Lawmakers such as Sen. Bob Corker, R-Tenn., praise the increases and say that they feel that even more changes are needed.

6. HARP 2.0 will expire

Although the Home Affordable Refinance Program was expanded and extended at the end of 2011, some say more changes could be on the way. Currently, homeowners can apply for this federal refinance program no matter how far underwater their home is. HARP 2.0 gives homeowners the ability to refinance into today's low mortgage rates without private mortgage insurance, exorbitant closing costs and fees or even an appraisal in most cases. The program is slated to expire at the end of 2013, so move quickly.

7. Rising rents

Rents rose for the third consecutive year in 2012 and are expected to continue the upward trend this year, according to MPF Research. The pace of rent growth was 3% in 2012, and analysts believe will see similar growth this year. Rising rents are another motivation for buyers to take advantage of affordable home prices and historically low mortgage rates.

8. Mortgage-interest deduction

The mortgage-interest deduction has been on the congressional chopping block for some time now. Certain lawmakers have proposed reducing the deduction or doing away with it altogether as a means to shore up the federal budget. The good news is that it's still in play and hasn't yet been scaled back. The bad news: The decision to reduce the deduction will likely come up again before too long

9. Increased affordability

Last year was a record year in terms of affordability, according to the NAR's National Housing Affordability Index. The index, based on the relationship among median home price, income and mortgage rates, hit 193.5 in 2012, up from 186.4 in 2011. The NAR predicts that the index will fall to an average of 161 in 2013, still the third-highest reading on record. Rising home prices and higher mortgage rates will adversely affect affordability to some degree, making 2013 a great time to buy or refinance.

10. Delinquencies have begun to wane

According to Lender Processing Services, even though the mortgage-delinquency rate remains high, delinquencies have improved, and were 32% lower at the end of 2012 than the peak in January 2010. The continued decline of mortgage delinquencies will help to firm home prices even more and increase homebuyer confidence. Fewer delinquencies mean fewer cheap properties coming on the market.

11. Desirability is back

Opportunism and desirability play huge roles in the mortgage and housing markets. Just a few years ago, there was little news to get homebuyers excited about the prospect of ownership. Today, people are less worried about losing their jobs, prices have stopped falling in many areas, home sales have picked up and consumers are seeing fewer foreclosures and more signs of construction. All these market signals reveal that other consumers are interested in buying again.