Why Are Mortgage Rates So High — and When Will They Actually Drop?

California mortgage rates remain at roughly 6.45% in May 2026 for three structural reasons, none of which are about the Federal Reserve's recent rate cuts. First, the 10-year Treasury yield (which mortgage rates track most closely per the Federal Reserve Bank of Boston) sits at 4.59% — well above the 2.5%-3.5% range that produced sub-5% mortgages from 2009 to 2022. Second, the ‘mortgage spread’ — the gap between the 10-year Treasury yield and mortgage rates — is currently 1.86%-2.0%, near the high end of historical norms. Bankrate notes this spread ‘typically spans 1.5 to 2 percentage points’ but grew to over 3 percentage points during 2023, and remains elevated as the Fed's balance sheet runs off and private MBS investors demand more compensation. Third, persistent inflation (core PCE at 2.7%) keeps the bond market pricing in long-term inflation risk. Consensus forecasts from the Mortgage Bankers Association, Fannie Mae, and California Association of Realtors project rates settling in the 5.75%-6.15% range by mid-2027 — a meaningful drop from today, but not a return to 2021's 3% rates.

Mortgage rates don't follow the Fed funds rate directly

The most common misunderstanding in client conversations is buyers assuming Fed rate cuts cause mortgage rates to drop by the same amount. They don't. The Federal Reserve sets the federal funds rate — the rate banks charge each other for overnight lending. Mortgage rates track the 10-year Treasury yield instead.

Why the difference matters: The federal funds rate currently sits at 4.25%-4.50%. The 10-year Treasury yield sits at 4.59%. The 30-year fixed mortgage averages 6.45%. The Fed could cut the funds rate to 3.50% tomorrow, but if the 10-year Treasury doesn't move (because long-term inflation expectations don't change), mortgage rates won't move meaningfully either.

The relationship per Bankrate: ‘Fixed-rate mortgages — the most popular type of home loan — don't mirror the federal funds rate; they track the 10-year Treasury yield. When that goes up or down, fixed-rate mortgage rates do, too. Your mortgage rate will be higher than the 10-year yield by an amount known as a spread or margin.’

A recent real-world example: The Fed cut rates by 0.25% in January 2026. The 10-year Treasury yield barely moved. Mortgage rates dropped a single basis point. The Fed cut, but the market didn't believe the cut was meaningful enough to change long-term inflation expectations.

Why the mortgage-Treasury spread is unusually high

Historically, mortgage rates have traded about 1.7%-2.0% above the 10-year Treasury. Right now, that spread is roughly 1.86%-2.0% — at the upper end of historical norms, though down from the 2023 peak of about 3.0%.

The Federal Reserve Bank of Boston's May 2026 research identifies three reasons the spread is sticky:

1. Prepayment risk has changed. Mortgage-backed securities (MBS) buyers — Fannie Mae, Freddie Mac, hedge funds, foreign banks, pension funds — charge a premium because rate cycles have become more volatile. They worry that if they buy a 6.5% MBS today, rates could drop 1% in 18 months and millions of homeowners would refinance — leaving the MBS holder with their principal returned much sooner than expected, at a time when reinvestment options pay less.

2. The Fed isn't buying. From 2008 to 2022, the Federal Reserve was the largest buyer of mortgage-backed securities through quantitative easing programs, holding the spread artificially low. Since 2022, the Fed has been letting its MBS portfolio shrink (quantitative tightening). Fannie Mae's research confirms: ‘The Fed's balance sheet run-off put upward pressure on the secondary spread, which was elevated, as private investors sought higher rates on MBS to absorb the additional share.’

3. Bank treasury demand has fallen. Regional banks were major MBS holders. After the Silicon Valley Bank and First Republic collapses in 2023, regional banks pulled back from long-duration assets including MBS. Less demand from a major buyer = higher spread.

The spread is gradually normalizing — it was over 3.0% at the 2023 peak — but the structural factors above mean we likely don't return to pre-2022 spreads of 1.5%-1.7% any time soon.

What it would actually take for rates to drop to 5%

Here's the math for what it would take to bring mortgage rates back to 5.0%:

Path 1: 10-year Treasury drops, spread stays the same.
- Current: Treasury 4.59% + spread 1.86% = 6.45% mortgage rate
- To get to 5.0%: Treasury needs to drop to 3.14% (a 145 basis point decline)
- For that to happen: inflation needs to fall sustainably below 2%, the labor market needs to weaken meaningfully, and the Fed would need to cut aggressively (likely 4+ cuts)
- Probability over next 18 months: roughly 15%-25%, mostly tied to recession scenarios

Path 2: Spread compresses, Treasury stays the same.
- Current spread 1.86% would need to drop to 0.41% — an unprecedented level not seen since the 1970s
- Highly unlikely without a return of Fed MBS purchases

Path 3: Both ease somewhat.
- Treasury drops 0.75% (to 3.84%) + spread compresses 0.40% (to 1.46%) = mortgage rate of 5.30%
- This is the most realistic path to sub-5.5% mortgages, but it requires inflation to ease meaningfully and a return of structural MBS demand
- Probability over 18-24 months: 30%-40%

The honest assessment: 5% mortgages are unlikely to return until 2028 at the earliest, and possibly not until the next significant economic downturn. The 2021 lows of 3% were a historical anomaly driven by emergency Fed policy that won't repeat absent another crisis.

Realistic forecasts for the next 18 months

Here's what major forecasters are projecting for 30-year mortgage rates:

Mortgage Bankers Association (most recent forecast): 6.1% by Q4 2026, 5.9% by Q4 2027

Fannie Mae: 6.2% by Q4 2026, 5.8% by Q4 2027

California Association of Realtors: 5.9% average for 2026 (running above this projection due to the spring rate uptick), 5.5% average for 2027

Goldman Sachs: 6.0% by year-end 2026, 5.5% by mid-2027

Norada Real Estate (May 2026 forecast): Notes that ‘geopolitical tensions, particularly in regions like the Middle East, have a ripple effect on global oil prices... This global uncertainty adds a geopolitical premium to things like mortgage rates and Treasury yields.’

These forecasts share a few assumptions: the Fed cuts rates 1-2 times in late 2026/early 2027; inflation moderates from 2.7% to 2.2%-2.4%; the 10-year Treasury drifts down to 3.85%-4.10%; the labor market softens modestly but doesn't crash; geopolitical risks (Iran conflict) ease.

Where forecasts could be wrong: a renewed inflation spike (oil shock, tariff escalation, fiscal expansion) could push rates back to 7%+. A deeper recession could push rates below 5.5% faster than expected. Six-month forecasts are speculative — but the directional consensus is mildly lower rates over the next 12-18 months, not a return to 2021 levels.

What this means for your decision

Based on the structural analysis above, here's how we frame the decision for California clients:

If you're shopping: Buy when you find the right home, don't try to time rates. Sub-6% rates are realistic in the 12-18 month window — refinance opportunistically when they arrive. The ‘marry the house, date the rate’ framework applies here.

If you're refinancing: Most refinances need a 0.75%+ rate drop to make sense after closing costs. With current rates at 6.45%, you'd need a rate near 5.70% to trigger a refi for most borrowers. That level may arrive in late 2026 or 2027 — set your lender's rate alert for your target rate and act when it triggers.

If you locked at 7%+ in 2023: You're a strong candidate for a refi as soon as rates drop another 0.25%-0.50%. Run the math now and have your lender notify you when your trigger rate hits.

If you're sitting on a 2020-era 3% loan: Don't refinance for rate alone — you already won that game. The only legitimate reasons to refinance now are a cash-out for a specific purpose (home improvement, debt consolidation, education), a divorce or inheritance situation, or removing PMI if you've hit 20% equity.

The bigger frame: California real estate has built generational wealth across many rate environments — including the 12%-18% mortgage rates of the late 1970s and early 1980s. Today's 6.45% rate isn't historically high; it just feels high relative to the anomalous 2020-2021 lows. Make decisions based on the home and your finances, not on the rate alone.

---

About the author: Mohammad "Mike" Basti is a California-licensed mortgage professional at Save Financial. Save Financial is licensed in all 58 California counties (NMLS #377740, DRE #01875766). For a personalized rate quote based on your situation, apply online or call 888-703-1840.

Disclaimer: This article reflects market conditions as of May 18, 2026 and represents general guidance, not personalized financial advice. Mortgage rates and program details change frequently. Always verify current rates and your specific eligibility with a licensed mortgage professional before making decisions.