Recently, mortgage rates in the U.S. have hit a new high in more than 20 years, and the cost of borrowing for Americans is rising rapidly, according to a statement from Freddie Mac, the U.S. housing finance agency。According to data released by Freddie Mac, as of August 17, the average interest rate on a 30-year fixed mortgage in the United States was 7.09%, the highest level since April 2002。Behind the steep rise in U.S. mortgage rates is the recent surge in U.S. 10-year Treasury yields, and generally speaking, the two changes into a positive relationship, that is, the higher the U.S. 10-year Treasury yield, the higher the U.S. mortgage rates will follow.。The principle behind it is also very simple, because the United States as one of the most developed countries in the world, U.S. Treasury bonds are also considered to be the core safety assets, that is, the so-called "risk-free assets," on this basis, the yield of U.S. debt can be regarded as a basic cost of funds, the rest of the cost of funds need to be priced on this basis, including the U.S. mortgage interest rates, and because of this, the U.S. benchmarkGlobal Asset Anchor。Battered by high mortgage rates, the U.S. housing market has shown clear signs of cooling, and to add insult to injury, the U.S. has also experienced a shortage of listings。According to Black Knight Inc, the affordability of housing for the American people has been depressed to its lowest point since 1984 as recent climbing borrowing costs and severe inventory shortages have pushed up home prices。At the same time, these problems have gradually spread to the second-hand housing market in the United States, where recent sales of second-hand housing have fallen as a lack of listings, rising costs and concerns about the economy have hampered many potential buyers.。