Glide Path Investing: What It Is, With Vanguard's Real Target-Date Allocations

Michael Whitman · Trading since 2017, full-time since 2020 · YouTube creator, 137K subscribers · Published 2026-09-08 · Updated 2026-11-02 · Reviewed 2026-11-01

In investing, a glide path is the planned schedule for moving a portfolio out of stocks and into bonds as a target date — usually retirement — gets closer.

Rather than describe a typical one, this page lays out a real one: the stock share of every Vanguard Target Retirement fund as printed in its January 2026 prospectus, which together trace the whole path from 45 years out to seven years past the date.

How it works

Each dated fund holds the mix the schedule calls for at its distance from the date. A fund for people retiring around 2050 is far from its date and mostly in stocks; a 2025 fund has arrived and holds about half in bonds.

The fund moves along the path on its own. Nobody has to rebalance by hand: the manager trims stocks and adds bonds a little at a time, and the fund name stays the same while the mix changes underneath it.

The prospectus states the rule in plain words: the share in stocks will decrease while bonds and other fixed income increase, and within seven years after the target year the mix should become similar to the Target Retirement Income Fund. That last clause matters, because it means the path does not stop at the date.

Why decline at all? Early on, a fall is survivable because decades remain for a recovery.

Near the date it is a different event. The balance is at its largest and withdrawals are about to begin, so a deep fall then does damage that later good years cannot fully repair. That risk, the order in which returns arrive, is called sequence risk, and the withdrawal strategy page covers it after the date.

Vanguard’s path, fund by fund

Read across the twelve funds and the shape is clear. As of 30 Sep 2025, the funds 25 or more years from their date (2050 through 2070) all held between 91.2% and 91.6% in stocks.

From there the stock share stepped down: 83.5% at 20 years out, 76.2% at 15, 68.6% at 10, 60.8% at 5 and 50.7% in the target year itself.

After the date it keeps going down, and faster. The 2020 fund, five years past its date, held 36.5% in stocks, and the Income fund 31.4%. That is 40.5 points shed over the 25 years before the date, about 1.6 points a year, and another 14.2 points in the five years after it, about 2.8 a year.

Vanguard’s own description of the path matches the prospectus numbers. Its workplace page, read on 1 Nov 2026, says the path starts at 90% stocks, begins reducing around age 40 and reaches its final mix of 30% stocks and 70% bonds at age 72, seven years after an assumed retirement at 65.

To or through

A path that glides to the date reaches its most conservative mix there and holds it. A path that glides through keeps reducing stocks for years afterward, as Vanguard’s does for seven.

The two give very different portfolios from the same target year. On Vanguard’s path the target year still holds about half in stocks, because the remaining years of retirement need growth; a “to” path would usually be lower at the date and flat after it.

Some designs deliberately rise again after the date, on the argument that the vulnerable window closes once the first years of withdrawals have passed. That is a serious proposal rather than a contradiction, and it follows from where sequence risk sits.

A worked example

Take a $400,000 balance and a 30% fall in stocks, and assume for simplicity that bonds hold their value. The loss depends only on how much of the $400,000 sits in stocks at each point on the path.

At the 2050 fund’s mix (91.2% stocks, 25 years out) $364,800 is in stocks and the fall costs $109,440, or 27.36% of the whole balance.

At the 2035 fund’s mix (68.6%, 10 years out) $274,400 is in stocks and the fall costs $82,320, or 20.58%.

At the 2025 fund’s mix (50.7%, the target year) $202,800 is in stocks and the fall costs $60,840, or 15.21%.

At the Income fund’s mix (31.4%) $125,600 is in stocks and the fall costs $37,680, or 9.42%.

The path cuts the damage by about 44% between 25 years out and the date. That is the insurance being bought; the premium is the growth the bonds give up in the years when stocks rise instead.

The rules of thumb

“Age in bonds” says hold your age as a percentage in bonds — 40% at forty, 65% at sixty-five. The “rule of 100” is the same rule from the other side: 100 minus your age in stocks. It is easy to remember and is not derived from anything.

Compared with a real fund it is much more cautious. At 65 the rule gives 35% stocks, while the Vanguard fund for someone retiring that year held 50.7%. At 40 the rule gives 60% stocks, while the fund 25 years from its date held 91.2%.

Both are defensible and neither is a calculation. The honest position is that a glide path is a judgment about a trade-off between growth and the size of a late fall, and it should be a knowing one.

The original data

Allocations: the twelve Vanguard Target Retirement summary prospectuses dated 28 Jan 2026, filed on SEC EDGAR and read on 1 Nov 2026, each list the fund’s mix as of 30 Sep 2025. Stocks here means U.S. plus foreign stocks; bonds means U.S. and foreign fixed income plus inflation-indexed securities.

The printed shares add up to 99.3% to 99.5%, so a fraction is cash or rounding.

Distance from the date is the fund’s year minus 2025, since the allocations are dated September 2025. The Income fund has no date; the prospectuses say each dated fund should resemble it within seven years after its target year.

Why the window matters: S&P 500 daily closes from 1950 through September 2026, excluding dividends, spent 93% of trading days below a previous record.

The deepest fall was 56.8%, from 2007 to 2009, and the longest wait for a new record was 7.5 years, from 1973 to 1980. Being below a high is normal; being forced to sell during one is the actual problem.

The question: Five years out and equities are running. Delay the glide?

The answer is that the glide exists precisely for the case where the run does not continue. Delaying it is a forecast, taken at the point where the balance is largest and a fall would do the most damage. The insurance is being canceled exactly when the premium looks most wasteful, which is the pattern for every kind of insurance.

When it fails

A glide path tied to a date can be wrong about the date. Someone who retires five years early meets the vulnerable window with a mix still built for someone working, and someone who works five years longer spends those years more cautious than their horizon needed. The schedule was right for the plan it was given; the plan changed.

A second failure is treating age as the input. The real inputs are your time horizon and how much loss you can absorb; age stands in for them.

A third is assuming to and through are interchangeable. They give different portfolios.

A fourth is holding a target-date fund next to other funds. The overall mix is then nobody’s design, and the glide path no longer describes what you own.

A fifth is delaying the glide after a strong run, which turns a schedule into a market call.

And a sixth is treating the endpoint as safe. Even 31.4% in stocks still has to outpace inflation for a retirement that may last thirty years.

Questions people ask

What is a glide path in a target-date fund?

It is the built-in schedule that moves the fund from mostly stocks to mostly bonds as its year approaches. In Vanguard’s funds that meant about 91% stocks 25 years out and 50.7% in the target year, per the 2026 prospectuses.

What is the difference between a “to” and a “through” glide path?

A “to” path stops changing at the target date; a “through” path keeps getting more conservative after it. Vanguard’s continues for seven years past the date.

Can I build my own glide path?

Yes. Pick a stock share for today, a lower one for your date and a final one after it, and move a little each year when you rebalance. The asset allocation page covers how to set the starting point.

Does a glide path remove sequence risk?

No, it shrinks it. With half the money still in stocks at the date, a deep fall in the first years of retirement still hurts; the path only reduces how much is exposed.

Related

Target-date funds are the product this schedule sits inside. Withdrawal strategy is the problem it was preparing for. And time horizon is the input it is really a proxy for.

This page is educational, not financial advice. Test every idea on your own charts before risking money.