Register For Our Mailing List

Register to receive our free weekly newsletter including editorials.

Home / 360

Choosing an index fund is more than just the expense ratio

Index funds were initially labelled a ‘sure path to mediocrity’ in their quest to mirror benchmarks. But since the first index fund was launched some 45 years ago, millions of investors across the world have taken advantage of this easy-to-implement investment vehicle that offers transparency, diversification, low costs and tax efficiency.

Many investors have found the search for winning active managers an exciting but ultimately unrewarding experience. In contrast, index funds have regularly produced returns that are 1-2% above the average active managers.

(Having said this, even investors who clearly recognise the powerful case for index funds often find a place in their carefully-constructed portfolios for some favoured actively managed funds. At Vanguard, it is not a case of having index or active management to the exclusion of the other).

Let’s talk about how to go about picking an index funds. When it comes to selecting a manager, there are a lot of options out there.

Costs are not the only differentiator

Driven in part by lower direct and indirect costs, which have benefited all investors, index products continue to grow in efficiency, popularity, and volume.

As a result, index fund expense ratios have compressed meaningfully across the industry and fee differences between funds have become less of a differentiator.

While this broad-based downward shift in index fund expense ratios has undoubtedly resulted in better investment outcomes and savings for all index investors, it has also created a new dilemma.

How does an index investor select managers and funds from the pack in this new 'everyone is a low-fee provider' environment? An investor might reasonably ask, how hard can indexing be?

Just like baking, all it takes is to follow a recipe precisely. Flour, water, yeast and a few hours later, the oven yields a lovely crisp loaf of sourdough. But as many have discovered on novice baking journeys brought on by the pandemic, the process is much more than throwing together a couple of ingredients and dropping it in the oven.

Indexing is not dissimilar. Resources, index expertise, investment sophistication and other factors can provide an edge. Investors should not merely pick the lowest cost index fund because, as with baking, the quality of the ingredients and the skills of the baker matter. 

Looking beyond expense ratios

Prudent investment selection cannot be achieved by focusing on cost alone.

When searching for and selecting between index investment options, investors should use a decision-making framework that takes into account a range of factors, including expenses, portfolio management capabilities, securities lending programmes, pricing strategies and scale in more equal weights than in the past.

A recent whitepaper by Vanguard provides a framework to help investors select the best index fund managers. Below are some of the main points covered.

Exploring the factors that matter

Organisational incentives – Index fund managers come in all shapes and sizes. The details here are important because an asset manager’s philosophy defines the incentives that drive the firm’s business strategy. Does the investor’s interest or the asset manager’s interest come first?

Portfolio management track record – Despite the boiler plate warnings, “past performance, while not a guarantee of future performance”, this is actually a great place to look. What historical track records do the index managers and funds have when it comes to performance after fees? Good index managers can track tightly and add incremental value to cover some or all of the management fees. Process frictions, inefficiencies and an inability to capture value add opportunities, like a thousand little papers cuts, will show up over time in long-term performance.

Buy/sell Spreads – When it comes to the total cost of ownership, buy/sell spreads must be factored in. What’s the point of going with a low expense ratio fund if it is lost on high spread costs?

With great scale comes better returns – Scale is a key differentiator and one that is increasingly difficult for new entrants to achieve. Scale enables asset managers to lower fixed trading costs like commissions and ticket charges, track or replicate benchmarks with greater precision and strengthen relationships with trading partners.

Expense ratio – I know I said it did not matter anymore, but there are a few managers and funds still charging high active-type prices for index products. This is an obvious red flag.

Managing an index is harder than it looks

Index equity managers should produce returns that are, on average, approximately equal to their benchmark index minus the fund’s expense ratio.

This concept applies broadly across markets, while the costs—and the consequent performance drag—range from minimal in developed markets to modest in emerging markets. For sophisticated index fund managers, opportunities exist to add value through the daily management of the portfolio.

Successfully taking advantage of these opportunities can effectively offset the expense ratio and increase investor returns.

Simple to understand, yes. Simple to execute, no.

Indexing is simple for investors to understand and use. It is this perception of indexing, of merely meeting a set benchmark, that has led to it being known as ‘passive‘ or ‘average’ investing. Indexing certainly is simple for investors to understand and use but it is definitely not simple to execute. Heavy investment activity and resourcing is required.

Not all indexers are the same, and this framework shows where to look in an index fund search.

 

Duncan Burns is Head of Equity Indexing for Asia Pacific at Vanguard Australia, a sponsor of Firstlinks. This article is for general information purposes only and does not consider the circumstances of any individual.

For more articles and papers from Vanguard Investments Australia, please click here.

 

6 Comments
Duncan Burns
June 08, 2020

Hi J.D. Good question. The framework in the White Paper explains many of the incremental value add/saving opportunities explored. With regards to a few specific areas where Vanguard can add value to cover some of the management fee or, in some cases in excess of the management fee, here are some examples in no particular order of importance:
• For international funds (particularly those investing in US securities) there is a difference between the assumed tax in the benchmark and that which is actually paid by an Australian investor, in the instance of Vanguard International Shares index fund this has historically added between 20 and 25 basis points per year to the funds return over the benchmark
• Participation in corporate actions can add some value at times e.g. capital raisings and placements
• Intelligent trading around index changes, cash flows and other corporate events
• Securities lending is generally considered by most academic and industry studies to promote and improve market efficiency (more information can be found in this WFE research report released April of this year: https://www.world-exchanges.org/our-work/articles/wfe-research-what-does-academic-research-say-about-short-selling-bans#:~:text=The%20WFE's%20paper%20%2D%20What%20does,inefficiency%20and%20hamper%20price%20discovery.)

DE
June 03, 2020

Lending (renting) investor's securities to short sellers?

Dave
June 03, 2020

Another issue to watch is the growth of Units on issue.
I invested in a simple ASX 200 index fund with low fees. This has allowed it to grow quite well but when it comes time for the quarterly distributions to be made the longer-term holder gets diluted as units created after the companies in the index have paid dividends also get their share of dividends in the ETF distribution.

Graham Hand
June 03, 2020

Hi Dave. this issue is common to many pooled funds, not only the one you identify. See this explanation: https://www.firstlinks.com.au/warning-investing-unit-trusts-june

Dave
June 03, 2020

Thanks Graham,
Just read the link.
Have many funds have used Attribution Managed Investment Trust mentioned in the article since 2017. I have never heard of it before.
Dave

 

Leave a Comment:

RELATED ARTICLES

Poacher turned gamekeeper changes his wealth model

Fund giant feels heat in ETF fee war

banner

Most viewed in recent weeks

Are LICs licked?

LICs are continuing to struggle with large discounts and frustrated investors are wondering whether it’s worth holding onto them. This explains why the next 6-12 months will be make or break for many LICs.

Retirement income expectations hit new highs

Younger Australians think they’ll need $100k a year in retirement - nearly double what current retirees spend. Expectations are rising fast, but are they realistic or just another case of lifestyle inflation?

Welcome to Firstlinks Edition 627 with weekend update

This week, I got the news that my mother has dementia. It came shortly after my father received the same diagnosis. This is a meditation on getting old and my regrets in not getting my parents’ affairs in order sooner.

  • 4 September 2025

5 charts every retiree must see…

Retirement can be daunting for Australians facing financial uncertainty. Understand your goals, longevity challenges, inflation impacts, market risks, and components of retirement income with these crucial charts.

Why super returns may be heading lower

Five mega trends point to risks of a more inflation prone and lower growth environment. This, along with rich market valuations, should constrain medium term superannuation returns to around 5% per annum.

The hidden property empire of Australia’s politicians

With rising home prices and falling affordability, political leaders preach reform. But asset disclosures show many are heavily invested in property - raising doubts about whose interests housing policy really protects.

Latest Updates

Shares

Four best-ever charts for every adviser and investor

In any year since 1875, if you'd invested in the ASX, turned away and come back eight years later, your average return would be 120% with no negative periods. It's just one of the must-have stats that all investors should know.

Our experts on Jim Chalmers' super tax backdown

Labor has caved to pressure on key parts of the Division 296 tax, though also added some important nuances. Here are six experts’ views on the changes and what they mean for you.        

Superannuation

When you can withdraw your super

You can’t freely withdraw your super before 65. You need to meet certain legal conditions tied to your age, whether you’ve retired, or if you're using a transition to retirement option. 

Retirement

A national guide to concession entitlements

Navigating retirement concessions is unnecessarily complex. This outlines a new project to help older Australians find what they’re entitled to - quickly, clearly, and with less stress. 

Property

The psychology of REIT investing

Market shocks and rallies test every investor’s resolve. This explores practical strategies to stay grounded - resisting panic in downturns and FOMO in booms - while focusing on long-term returns. 

Fixed interest

Bonds are copping a bad rap

Bonds have had a tough few years and many investors are turning to other assets to diversify their portfolios. However, bonds can still play a valuable role as a source of income and risk mitigation.

Strategy

Is it time to fire the consultants?

The NSW government is cutting the use of consultants. Universities have also been criticized for relying on consultants as cover for restructuring plans. But are consultants really the problem they're made out to be?

Sponsors

Alliances

© 2025 Morningstar, Inc. All rights reserved.

Disclaimer
The data, research and opinions provided here are for information purposes; are not an offer to buy or sell a security; and are not warranted to be correct, complete or accurate. Morningstar, its affiliates, and third-party content providers are not responsible for any investment decisions, damages or losses resulting from, or related to, the data and analyses or their use. To the extent any content is general advice, it has been prepared for clients of Morningstar Australasia Pty Ltd (ABN: 95 090 665 544, AFSL: 240892), without reference to your financial objectives, situation or needs. For more information refer to our Financial Services Guide. You should consider the advice in light of these matters and if applicable, the relevant Product Disclosure Statement before making any decision to invest. Past performance does not necessarily indicate a financial product’s future performance. To obtain advice tailored to your situation, contact a professional financial adviser. Articles are current as at date of publication.
This website contains information and opinions provided by third parties. Inclusion of this information does not necessarily represent Morningstar’s positions, strategies or opinions and should not be considered an endorsement by Morningstar.