No doubt you’ve heard that mortgage rates are low. They’re lower than they’ve ever been in history.  The news is everywhere.

Just check out some of these headlines from the last 24 hours:

• Mortgage rates set new lows for the 6th straight week (Reuters)
• Mortgage rates fall again; 30-year fixed at 4.54% (Wall Street Journal)
• Mortgage rates hit another low : 4.54% (NPR)

Fixed mortgage rates are now down more than 1/2 percent from the start of the year, and 3/4 percent from just 1 year ago. The drop has dramatically improved home affordability for home buyers in Farragut while creating refinance opportunities for existing homeowners.

From a payment perspective, a conforming, 30-year fixed rate mortgage is now cheaper by $41.94 per month per $100,000 borrowed versus July 2009.

A homeowner with a $300,000 mortgage, therefore, is saving $45,295.20 over 30 years.

Low mortgage rates rarely last long and rates appear to have troughed. After a big downhill between April and July, they’re now flat. This could mean rates have finished falling, or that they’re gearing up for another drop lower. Either way, if you haven’t talked to your real estate agent about home affordability, or your loan officer about refinancing, it may be time to make that call.

If today’s market marks the end of low rates, rates are expected to rise quickly.

You can’t get your mortgage rates from the newspaper. Last week proved it.  Again.

Friday morning, headlines in Tennessee and around the country read that mortgage rates were down 0.04 percent, on average, since the week prior.

A sampling of said headlines includes:

• US Mortgage Rates Drop For 2nd Straight Week (Reuters)
• Mortgage Rates On 30-year US Loans Fall To 4.93% (Business Week)
• 30-Year Fixed Mortgage Rate Falls Farther Below 5% (Marketwatch)

The story behind the headline was sourced from the Freddie Mac Primary Mortgage Market Survey, am industry-wide mortgage rate poll of more than 100 lenders.  The PMMS has reported mortgage rate data to markets since 1971 and is the largest of its kind.

Unfortunately, Knoxville rate shoppers can’t rely on it.

See, unlike governments and private-sector firms, when consumers are in need mortgage rate information, they need the information delivered in real-time; for making decisions on-the-spot.  Consumers need to know what rates are doing right now.

The Freddie Mac survey can’t offer that.

According to Freddie Mac, the survey’s methodology is to collect mortgage rates from lenders between Monday and Wednesday and to publish that data Thursday morning.  The survey results are an average of all reported mortgage rates. The problem is that mortgage rates change all day, every day.  The PMMS results are skewed, therefore, by methodology.

And, meanwhile, the issue was compounded last week because mortgage rates shot higher Wednesday afternoon — after the survey had “closed”.  The market deterioration ran into Thursday, too — again, unable to be captured by Freddie Mac’s PMMS.

Although the newspapers reported mortgage rates down last week, they weren’t.  Conforming mortgage rates were higher by at least 1/8 percent, or roughly $11 per $100,000 borrowed per month.  In some cases, rates were up by even more.

Newspapers and websites can give a lot of good information, but pricing is far too fluid to rely on a reporter. When you need to know what mortgage rates are doing in real-time, make sure you’re talking to a loan officer.  Otherwise, you may just be getting yesterday’s news.