Mortgage rates moved today.

Should you lock?

Should you wait?

What if rates drop tomorrow?

What if they go up?

Welcome to one of the most overthought parts of getting a mortgage.

A mortgage rate lock isn’t a prediction about where rates are going.

It’s protection against what might happen while you’re trying to close the damn loan.

Let’s break it down.

What Is a Mortgage Rate Lock?

A mortgage rate lock is an agreement that protects a specific interest rate for a defined period while your loan moves toward closing, assuming the conditions of the lock are met.

Without a lock, your mortgage rate can potentially change as market rates move.

Once you’re properly locked, normal market movement during the lock period generally doesn’t change the agreed rate.

That’s the entire point.

Why Do Mortgage Rates Change?

Mortgage pricing responds to financial markets.

And financial markets move.

Inflation data.

Employment reports.

Federal Reserve expectations.

Bond-market movement.

Economic news.

Geopolitical events.

All kinds of shit can move markets.

Trying to perfectly predict tomorrow’s mortgage rate is not a strategy.

It’s guessing.

When Can You Lock Your Mortgage Rate?

The exact process varies by lender.

Generally, you’ll need to have an actual loan in process and enough information for the lender to price and lock the transaction.

A random rate quote isn’t necessarily a rate lock.

This matters.

Someone telling you:

“I can get you 6%”

is very different from:

“Your loan is locked at 6% through this date under these terms.”

Ask whether you’re actually locked.

How Long Does a Rate Lock Last?

Rate locks are available for defined periods.

Common lock periods might include 30, 45 or 60 days, although lenders may offer shorter or longer options.

The right lock period should give enough time to get the transaction closed.

Longer locks may carry different pricing than shorter locks.

Again:

There is no free lunch.

What Happens If Rates Go Up After You Lock?

This is why you locked.

Assuming the lock remains valid and the transaction meets its conditions, normal market increases generally don’t cause your locked rate to increase.

You protected yourself.

That’s the benefit.

What Happens If Rates Drop After You Lock?

Now everybody suddenly hates their rate lock.

“I locked yesterday and rates dropped!”

Okay.

The lock wasn’t designed to guarantee you the lowest rate that occurs at any point before closing.

It protected you from the opposite happening.

Some lenders may offer a float-down option under certain circumstances.

Others may not.

The terms matter.

Ask before you lock.

What Is a Float-Down?

A float-down is a feature that may allow a borrower to receive improved pricing if market rates fall after the initial lock.

It isn’t universal.

It may have restrictions.

There may be fees or minimum market-movement requirements.

Don’t assume your rate automatically drops just because mortgage rates improve after you lock.

Find out exactly what your lender offers.

What Happens If the Rate Lock Expires?

This can get expensive.

If your loan doesn’t close before the lock expires, the lock may need to be extended.

Depending on the lender and why the delay occurred, there may be a cost associated with extending it.

That’s another reason I care about getting the damn loan ready upfront.

Documents matter.

Communication matters.

Deadlines matter.

A sloppy loan process can become a pricing problem.

Should You Lock or Wait?

Nobody knows exactly where rates will be tomorrow.

So the decision comes down to risk.

If today’s rate and payment work for you and you’re comfortable with the transaction, locking removes one variable.

If you choose to float because you think rates will improve, understand what you’re doing.

You’re accepting the possibility that rates could get worse too.

That’s not necessarily wrong.

Just don’t confuse it with certainty.

Don’t Compare Rates Without Comparing Costs

This is another big one.

A lower rate might require paying discount points.

So when somebody tells you they have a better rate, ask:

At what cost?

We’ve already covered this in:

Mortgage Points Explained: Should You Buy Down Your Interest Rate?

Rate without cost is an incomplete comparison.

Every damn time.

The Bottom Line

A rate lock is about certainty.

It doesn’t guarantee that you picked the lowest rate the market will ever offer.

Nobody can guarantee that.

It protects an agreed rate for a defined period while you work toward closing.

Understand:

Your rate.

Your points.

Your lock expiration.

Your extension policy.

And whether there’s a float-down option.

Then make the decision.

Stop trying to perfectly time mortgage rates.

Get a loan structure that works and understand exactly what you’re agreeing to.