In areas like San Francisco, where home prices are inherently high, even a 0.1% change in mortgage rates can significantly impact monthly payments. Therefore, I will carefully examine how these rates are determined.

First, let's look at the concept of the 10-year Treasury yield. Simply put, this is the interest rate that the U.S. government pays to investors when borrowing money for 10 years. The 30-year fixed mortgage tends to move in tandem with this Treasury yield, so when the yield rises, mortgage rates often follow suit.

The second factor is the Federal Reserve's benchmark interest rate. While the Fed does not directly link the benchmark rate to mortgage rates, a stance aimed at controlling inflation tends to raise overall market interest rate expectations. Additionally, how much investors buy in the MBS, or mortgage-backed securities market, also affects actual rates.

As for the current levels, as of 2026, the average rate for a 30-year fixed mortgage appears to be in the mid to high 6% range according to Freddie Mac PMMS. The 15-year fixed rate is typically about 0.5% lower due to its shorter repayment period.

If you're unfamiliar with ARMs, or adjustable-rate mortgages, think of them this way: for the first 5 or 7 years, they maintain a low fixed rate, after which they adjust annually based on market rates. If you plan to move again in a few years, you can take advantage of the initial low-rate period, but if you plan to stay long-term, a 30-year fixed mortgage may be a more comfortable choice.

Your credit score is also a significant variable. A score above 740 increases the likelihood of receiving favorable rates, while a score in the 620 range may result in rates nearly 1% higher for the same product. Since the down payment ratio and DTI (debt-to-income ratio) are also evaluated, a single credit score does not solely determine the outcome.

In San Francisco, due to high home prices, many people often need to use Jumbo Loans. Jumbo Loans can have different underwriting standards and rate structures compared to conventional loans, so it's advisable to consult with a lender in advance to determine which product suits you best.

If you are part of the Korean community, I recommend checking your credit report in advance, lowering your credit utilization, and obtaining estimates from at least three lenders for comparison. Increasing your down payment can also help reduce PMI costs.

While it's difficult to predict exactly how much rates will decrease in the future, if inflation stabilizes, there is a possibility they may gradually decline. Rather than waiting for that moment, it may be more realistic to prepare a loan structure that fits your current conditions.