NEW YORK (AP) -- Lawmakers weren't able to prevent the country from losing its coveted AAA debt rating.Although the downgrade late Friday by Standard & Poor's was historic, it wasn't entirely unexpected. The three main credit agencies, which also include Moody's Investors Service and Fitch Ratings, had warned during the fight over the debt ceiling that if Congress did not cut spending far enough, the country faced a downgrade.And just like a lower consumer credit score implies that a borrower is a less reliable, a lower credit rating for government bonds implies there is more risk involved in lending money to the government.Prices for U.S. government debt rose in the first few hours of trading on Monday, a sign of increased demand despite the downgrade. But it is unclear what will happen in the long term, because of the unprecedented nature of the lower rating and the decisions by Moody's and Fitch to keep their highest ratings for now."If they all were saying exactly the same thing that would clearly have more impact than with a split rating," Alex Pollack, a fellow at the American Enterprise Institute in Washington.If investors get skittish and Treasury prices reverse course, that could send the interest rate on Treasury bonds up. Essentially, the rate, or yield, would climb in order to make the bonds more attractive to investors. That could lead to higher borrowing rates for consumers, because the rates on mortgages and other loans are often pegged to the yield on Treasury bonds.Not every type of consumer borrowing has a direct tie to the government's credit rating, but there are potential ripple effects for individuals.-- Mortgage and home equity loansS&P's downgrade may have several implications for homeowners.For starters, early Monday S&P downgraded the credit ratings of mortgage giants Fannie Mae and Freddie Mac, which are both backed by the U.S. government. That could mean higher mortgage rates for new borrowers. Freddie and Fannie together own or guarantee about half of all mortgages in the U.S.Anyone hoping to buy a home in the near future likely has some time before they'll see rates climb. Still they should ask their bank or mortgage broker about the process for locking in a rate. Mortgage rates have been at historic lows in recent months, but fixed-rate mortgages are typically directly tied to the yield on 10-year Treasury bonds. Higher mortgage rates would follow any increase in the Treasury yield. But so far it appears that Treasury yields won't rise simply as a result of the downgrade.Variable rate mortgages and home equity loans could become more expensive as well.The high failure rate for adjustable rate mortgages during the housing meltdown means that today the number of new home loans with adjustable rates is minimal -- less than 5 percent of the market, according to Stephen Malpezzi, an economics professor at the University of Wisconsin Business School who follows the housing market.What's less clear is how many older loans with adjustable rates remain out there, he said. With interest rates low in recent years, many homeowners who held adjustable rate mortgages have refinanced to fixed-rates. For homeowners who still have ARMs, any potential change in their interest rates depends on whether their loan was linked to Treasury rates or some other benchmark, like the prime rate or federal funds rate.Meanwhile, home equity loans, or HELOCs, are almost always variable rate loans and typically adjust more frequently than first mortgages, sometimes even monthly.Homeowners with such loans could see shifts in their rates and payments while the markets absorb the downgrade.One caveat is that many ARMs and most HELOCs are tied to the federal funds rate, which is set by the Federal Reserve, not to Treasuries. That should help insulate borrowers. The Fed, which meets Tuesday, has already said that it plans to keep rates low for "an extended period.""The Fed is not likely to increase the federal funds rate anytime in the near future, especially if there's another problem with the economy as a result of the whole debt ceiling thing," said Gibran Nicholas, chairman of the Certified Mortgage Planning Specialist Institute.-- Credit cardsConsumers across the country, who carry an average $4,950 on their credit cards according to TransUnion, will be relieved to know that any changes as a result of the downgrade won't be dramatic. And to the extent there are changes, certain protections are in place.Most accounts with fixed rates were converted to variable rates in 2009 in response to the economic downturn and new regulations.Banks don't publicize the rates they're charging current customers, but nearly 96 percent of the offers sent out for new cards in the first six months of this year carried variable rates, according to Mintel Compermedia, a market research firm.Right now, banks are offering an average annual interest rate of 14.4 percent, according to Bankrate.com.However, like HELOCs, most card rates rise and fall with the prime rate, which is pegged to the rate set by the Fed. That will help protect credit card users from the market's gyrations in the short term.The good news is that even if market forces start sending card rates higher, current account balances will be protected from rate hikes under the credit card reforms passed in 2009. That means only new charges would be subject to higher rates. If rates rise several times over a period of months, card users could end up with multiple rates on various balances.John Ulzheimer, president of consumer education for SmartCredit.com, noted that the law now requires banks to apply any payments above the minimum required to the highest rate balance. That's so those new balances may get paid off faster. But any scenario involving volatility could make for some confusing statements.