The quick read: Yes, if your fixed-rate quote is priced off the 10-year Treasury and the deal still works at today's coupon, lock the index now instead of waiting for the Federal Reserve's October 27-28, 2026 meeting. The Fed sets the overnight federal funds rate; the 10-year moves on its own. Treasury's daily yield curve shows the 10-year at 4.70% on August 3, 2026 and 5.31% on October 5, a rise of 61 basis points (our arithmetic), while the Fed raised its target range once, by a quarter point, on September 16. On October 20 the 10-year stood at 5.12%. The agency index locks described below take a 2% deposit and hold proceeds inside a 10% band, so the price of certainty is known before you sign. This article was written before the October meeting and does not state or predict its outcome.
What does a fixed-rate commercial loan quote float on until you lock?
A fixed-rate commercial loan quote floats on two numbers until you lock, a Treasury index and the lender's spread over it, so the coupon printed on your term sheet can move every trading day between the quote and the lock. The Fed's October decision touches the index only indirectly, through the market's read of the policy path.
Freddie Mac's Index Lock term sheet (May 2025) shows the split clearly. Its Index Lock lets a borrower lock "the Treasury index (subject to the quoted Treasury Floor)" for a fixed-rate loan once a signed application has been delivered, and it says the spread will not be subject to market grid movements during the lock period. It also says the quote will be adjusted if assumptions change, such as the loan terms, the property, the borrower or certain loan document modifications. That second clause is why a locked rate can still move, which our explainer on why a lender changes the rate or proceeds after the term sheet walks through.
The tape since early August makes the point about the index. Every figure below is a Treasury par yield or a Fed rate, printed with its observation date:
10-year Treasury, August 3, 2026 (Treasury daily par yield curve): 4.70% 10-year Treasury, September 16, 2026, the day of the last Fed decision (Treasury): 5.01% 10-year Treasury, October 5, 2026, the August to October high (Treasury): 5.31% 10-year Treasury, October 20, 2026, latest close at writing (Treasury): 5.12% Federal funds target range after the September 16, 2026 decision (Federal Reserve): 3-3/4 to 4 percent Interest on reserve balances, effective September 17, 2026 (FOMC minutes): 3.90 percent Next FOMC meetings (Federal Reserve calendar): October 27-28 and December 8-9, 2026
| Treasury par yield (Treasury) | Aug 3, 2026 | Sep 16, 2026 | Oct 5, 2026 | Oct 20, 2026 |
|---|---|---|---|---|
| Treasury par yield (Treasury) 2-year | Aug 3, 2026 4.25% | Sep 16, 2026 4.74% | Oct 5, 2026 4.84% | Oct 20, 2026 4.79% |
| Treasury par yield (Treasury) 5-year | Aug 3, 2026 4.40% | Sep 16, 2026 4.86% | Oct 5, 2026 5.06% | Oct 20, 2026 4.94% |
| Treasury par yield (Treasury) 7-year | Aug 3, 2026 4.54% | Sep 16, 2026 4.94% | Oct 5, 2026 5.19% | Oct 20, 2026 5.02% |
| Treasury par yield (Treasury) 10-year | Aug 3, 2026 4.70% | Sep 16, 2026 5.01% | Oct 5, 2026 5.31% | Oct 20, 2026 5.12% |
The September minutes, released October 7, explain why the long end moved more than the policy rate. They say nominal yields "increased around 35 basis points across the 2- to 10-year segment of the yield curve" over the intermeeting period, that part of the rise reflected the higher expected path of policy and strong economic data, and that market commentary also pointed to geopolitical developments, uncertainty around the Treasury's buyback program and heavy private borrowing to fund AI infrastructure as contributing to higher term premiums. None of that is decided at the October meeting. Our rates page tracks the current benchmarks.
What does an index lock cost a commercial borrower?
An index lock costs a commercial borrower a good faith deposit, 2% of the locked amount on both agency programs, plus a commitment to close inside a fixed window and a proceeds band, with breakage owed if the loan shrinks too far or the borrower walks away before the full rate lock.
The two agency multifamily programs publish their terms. Freddie Mac's term sheet sets out three lock routes, and Fannie Mae added a Streamlined Treasury Lock to its Multifamily Guide effective August 20, 2026. The table puts them side by side. Bank and life-company lenders set their own lock deposits and windows and do not publish them in a source we can cite, so get those terms in writing.
Agency lock options compared (Freddie Mac Index Lock term sheet, May 2025; Fannie Mae Multifamily Guide Section 308 and Guide Update 26-22):
| Lock term | Freddie Mac Index Lock | Freddie Mac Early Rate-Lock | Freddie Mac Standard Delivery | Fannie Mae Streamlined Treasury Lock |
|---|---|---|---|---|
| Lock term What is locked | Freddie Mac Index Lock Treasury yield only; spread held from market grid moves | Freddie Mac Early Rate-Lock Interest rate (fixed) or spread (floating) | Freddie Mac Standard Delivery Interest rate (fixed) or spread (floating) | Fannie Mae Streamlined Treasury Lock Index locked; investor spread and credit fees held |
| Lock term Good faith deposit | Freddie Mac Index Lock 2% | Freddie Mac Early Rate-Lock 2%, adjusted for longer locks | Freddie Mac Standard Delivery Not required | Fannie Mae Streamlined Treasury Lock 2.00% of the lock amount, or more if required |
| Lock term Lock window | Freddie Mac Index Lock 60 days after quote expiration (most conventional loans) | Freddie Mac Early Rate-Lock Typically 60 to 120 days until purchase | Freddie Mac Standard Delivery Typically 45 days until purchase | Fannie Mae Streamlined Treasury Lock Full rate lock due by the quote letter expiration date |
| Lock term Approval time | Freddie Mac Index Lock 1 to 2 business days | Freddie Mac Early Rate-Lock 2 to 5 business days | Freddie Mac Standard Delivery 2 to 3 weeks | Fannie Mae Streamlined Treasury Lock Not stated |
| Lock term Proceeds band | Freddie Mac Index Lock Up to 10% reduction without breakage; above 110% at a blended rate | Freddie Mac Early Rate-Lock Most terms set; loan amount subject to change | Freddie Mac Standard Delivery All loan terms set before lock | Fannie Mae Streamlined Treasury Lock Final amount within 90% to 110% of the lock amount |
| Lock term Breakage, fixed rate | Freddie Mac Index Lock Standard formula, 0.5% minimum, 3.0% maximum | Freddie Mac Early Rate-Lock Standard formula, 0.5% minimum, 3.0% maximum | Freddie Mac Standard Delivery Standard formula, 0.5% minimum, 3.0% maximum | Fannie Mae Streamlined Treasury Lock Greater of 0.5% or hedge costs, capped at the deposit |
| Lock term Who can use it | Freddie Mac Index Lock Borrowers with a Freddie Mac loan purchased in the last 24 months; some first-time borrowers | Freddie Mac Early Rate-Lock Standard underwriting | Freddie Mac Standard Delivery Standard underwriting | Fannie Mae Streamlined Treasury Lock Fixed-rate loans; sponsors with a Fannie Mae loan in the last 24 months |
Budget the deposit as cash you post at lock: on a $10,000,000 lock, 2% is $200,000 (our arithmetic). On the Fannie Mae option, the breakage fee cannot exceed that deposit.
How much does a move in the 10-year change an illustrative loan?
On an illustrative stabilized property with $1,000,000 of net operating income, sized at 1.25 times debt service coverage on 30-year amortization, the 61 basis point rise in the 10-year from August 3 to October 5 cuts the maximum loan by about $659,000, even though the Fed moved only a quarter point.
Every input is an assumption chosen to show the mechanism: a spread of 1.60 percentage points over the 10-year, held constant, which is not a quote or a market survey. The index values are Treasury's closes on each date.
| Illustrative line (our arithmetic) | Aug 3 index 4.70% | Sep 16 index 5.01% | Oct 5 index 5.31% | Oct 20 index 5.12% |
|---|---|---|---|---|
| Illustrative line (our arithmetic) Coupon (index plus assumed 1.60) | Aug 3 index 4.70% 6.30% | Sep 16 index 5.01% 6.61% | Oct 5 index 5.31% 6.91% | Oct 20 index 5.12% 6.72% |
| Illustrative line (our arithmetic) Annual debt service per $10,000,000 | Aug 3 index 4.70% $742,767 | Sep 16 index 5.01% $767,183 | Oct 5 index 5.31% $791,123 | Oct 20 index 5.12% $775,926 |
| Illustrative line (our arithmetic) Largest loan at 1.25x on $1,000,000 NOI | Aug 3 index 4.70% About $10,771,000 | Sep 16 index 5.01% About $10,428,000 | Oct 5 index 5.31% About $10,112,000 | Oct 20 index 5.12% About $10,310,000 |
Two numbers matter for the lock decision. Each 10 basis points of index adds roughly $8,000 a year of debt service per $10,000,000 at these terms, and a quarter point adds about $20,000 (our arithmetic). When coverage binds the loan size, the proceeds swing is the bigger risk, because a lower loan amount can force more equity at closing. A lock fixes that number before the meeting instead of after it.
What if rates fall after you lock?
If rates fall after you lock, you keep the locked index and give up the improvement, and walking away to chase a lower rate triggers breakage, which the agency terms set at a 0.5% minimum of the locked amount, up to 3.0% on Freddie Mac's routes or up to the deposit on Fannie Mae's.
That is the trade a lock makes: you swap the chance of a better rate for a known ceiling on the worst case. On the illustrative $10,310,000 loan, a 0.5% minimum breakage is $51,550, and the 3.0% Freddie Mac cap is $309,300 (our arithmetic). Compare that bounded cost with the proceeds swing in the table above, where one autumn move cost more than $650,000 of loan amount at constant coverage.
Freddie Mac's term sheet adds that the 3% cap does not apply in cases of fraud or intentional misrepresentation, and that an Index Lock is not a commitment or a credit approval. Underwriting still has to clear. If you want to weigh locking against waiting with your own rate scenarios and odds, the lock versus wait calculator runs the arithmetic, including what you pay to carry the deal while you wait.
Who should wait instead of locking before the meeting?
You should wait instead of locking before the meeting if the deal fails at today's coupon, if the final loan amount could move by more than about 10%, if the loan documents are still being negotiated, or if closing sits outside the lock window, because each of those turns the deposit into money at risk.
The specific cases:
- The deal does not work at today's coupon. A lock fixes the rate; it does not fix coverage. If the loan only sizes at a lower rate, a lock just preserves a shortfall.
- The loan amount is uncertain. Freddie Mac allows a 10% proceeds reduction without breakage, and Fannie Mae requires the final amount to land within 90% to 110% of the locked amount. An appraisal or rent roll still in flux can push you outside the band.
- Loan documents are still open. Fannie Mae's Guide says that after the lock agreement is signed, later unapproved loan document modification requests are not a defense for failing to enter the full rate lock. Settle the documents first.
- Closing is too far out. Freddie Mac's Index Lock runs 60 days after quote expiration for most conventional loans. A longer path needs a different lock.
- You are new to the agency. Both streamlined options lean on a 24-month borrowing history with the agency. First-time borrowers usually look at the early or standard lock routes.
- Your loan floats. A SOFR-based bridge or construction loan has no Treasury index to lock; its question is the rate cap, not the lock.
For bank, life-company and conduit loans, ask each lender for its lock deposit, window, proceeds band and breakage formula before you compare quotes. Our 2026 commercial real estate loan rates guide covers which lender types and indexes price each property type.
How do you get a fixed-rate commercial loan quoted and locked on the right terms?
You get a fixed-rate commercial loan quoted and locked on the right terms by putting one complete package in front of several lender types at the same time, then comparing index, spread, deposit, lock window, proceeds band and breakage on one sheet before you sign any lock agreement.
The brokerage route comes first because it produces that comparison from one submission, instead of the borrower running each application. YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. Its software matches the deal against 20,000+ loan programs, and human brokers then structure the request, negotiate for the borrower and carry the deal toward closing. YieldStack reports a median first offer in under an hour, from an institutional lender. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
How the channels compare for a borrower deciding whether to lock this month:
- Brokerage route (YieldStack), our first pick as the publisher of this guide: one submission, quotes from several lender types for the same package, and lock terms compared side by side. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing.
- Agency multifamily lenders: the published index and rate locks above, for eligible properties and sponsors.
- Banks: relationship pricing and lock terms set lender by lender.
- Life companies and conduit lenders: long fixed-rate terms with their own deposits, windows and prepayment structures.
What to send so the quotes are comparable:
- Trailing 12-month operating statement and current rent roll
- Target loan amount, term and amortization, and the lowest amount the deal can accept
- Expected closing date and any hard deadline in the purchase contract or current loan
- The current term sheet or quote, if you already hold one, with its quote expiration date
- Your agency borrowing history over the last 24 months, if any
When the package is ready, send the deal for review and ask for lock terms with every quote.
The bottom line
The October 27-28 meeting sets the overnight rate, not your fixed coupon. The 10-year rose 61 basis points between August 3 and October 5 while the Fed moved a quarter point. If your deal works at today's coupon and the loan amount is settled within the lock band, lock the index; if not, fix the deal first.