How (And When) To Rebalance Your Portfolio

How And When To Rebalance Your Portfolio

Setting up the initial asset allocation for your investment portfolio is fairly straightforward. The challenge is knowing how and when to rebalance your portfolio. Stock and bond prices move up and down, and you periodically add new money – all of which can throw off your initial targets.

Let’s say you’re an index investor like me and use one of the Canadian Couch Potato’s model portfolios – TD’s e-Series funds. An initial investment of $50,000 might have a target asset allocation that looks something like this:

Fund Value Allocation Change
Canadian Index $12,500 25%
U.S. Index $12,500 25%
International Index $12,500 25%
Canadian Bond Index $12,500 25%

The key to maintaining this target asset mix is to periodically rebalance your portfolio. Why? Because your well-constructed portfolio will quickly get out of alignment as you add new money to your investments and as individual funds start to fluctuate with the movements of the market.

Indeed, different asset classes produce different returns over time, so naturally your portfolio’s asset allocation changes. At the end of one year, it wouldn’t be surprising to see your nice, clean four-fund portfolio look more like this:

Fund Value Allocation Change
Canadian Index $11,680 21.5% (6.6%)
U.S. Index $15,625 28.9% +25%
International Index $14,187 26.2% +13.5%
Canadian Bond Index $12,725 23.4% +1.8%

Do you see how each of the funds has drifted away from its initial asset allocation? Now you need a rebalancing strategy to get your portfolio back into alignment.

Rebalance your portfolio by date or by threshold?

Some investors prefer to rebalance according to a calendar: making monthly, quarterly, or annual adjustments. Other investors prefer to rebalance whenever an investment exceeds (or drops below) a specific threshold.

In our example, that could mean when one of the funds dips below 20 percent, or rises above 30 percent of the portfolio’s overall asset allocation.

Don’t overdo it. There is no optimal frequency or threshold when selecting a rebalancing strategy. However, you can’t reasonably expect to keep your portfolio in exact alignment with your target asset allocation at all times. Rebalance your portfolio too often and your costs increase (commissions, taxes, time) without any of the corresponding benefits.

According to research by Vanguard, annual or semi-annual monitoring with rebalancing at 5 percent thresholds is likely to produce a reasonable balance between controlling risk and minimizing costs for most investors.

Rebalance by adding new money

One other consideration is when you’re adding new money to your portfolio on a regular basis. For me, since I’m in the accumulation phase and investing regularly, I simply add new money to the fund that’s lagging behind its target asset allocation.

For instance, our kids’ RESP money is invested in three TD e-Series funds. Each month I contribute $416.66 into the RESP portfolio and then I need to decide how to allocate it – which fund gets the money?


Rebalancing TD e-Series Funds

My target asset mix is to have one-third in each of the Canadian, U.S., and International index funds. As you can see, I’ve done a really good job keeping this portfolio’s asset allocation in-line.

How? I always add new money to the fund that’s lagging behind in market value. So my next $416.66 contribution will likely go into the International index fund.

It’s interesting to note that the U.S. index fund has the lowest book value and least number of units held. I haven’t had to add much new money to this fund because the U.S. market has been on fire; increasing 65 percent since I’ve held it, versus just 8 percent each for the International and Canadian index funds.

One big household investment portfolio

Wouldn’t all this asset allocation business be easier if we only had one investment portfolio to manage? Unfortunately, many of us are dealing with multiple accounts, from RRSPs, to TFSAs, and even non-registered accounts. Some also have locked-in retirement accounts from previous jobs with investments that need to be managed.

The best advice with respect to asset allocation across multiple investment accounts is to treat your accounts as one big household portfolio.

That’s easier said than done if you’ve got multiple accounts held at various banks and investment firms. The goal in this case should be to simplify your portfolio and, if possible, hold the same portfolio across all accounts to avoid complexity and confusion.

This goes counter to the idea of keeping fixed income in your RRSP, and Canadian equities in your TFSA, for example.

In my experience, the simpler the portfolio, the easier it is to manage and stick to for the long-term. Imagine the nightmare of trying to rebalance multiple portfolios with different asset allocation targets whenever you add new money and as stocks and bonds move up and down. 

Related: Top ETFs and Model Portfolios for Canadians

My investment accounts are super easy to manage today, with my RRSP, TFSA, and LIRA all invested in Vanguard’s VEQT. The beauty of these asset allocation ETFs is that they are a wrapper containing multiple ETFs, each representing different stock and bond indexes from around the world. The funds are then automatically rebalanced for you to always maintain their initial target mix.

If you prefer to hold multiple index funds or ETFs in your accounts, aim to keep the same asset mix across all of your accounts to avoid complexity. Follow a rebalancing strategy by date or by threshold and stick to it. And, when adding new money, contribute to the fund that’s lagging behind its target weight.

Ideally, you can avoid rebalancing altogether by using an asset allocation ETF (VBAL, VGRO, etc.), or by investing with a robo advisor where they automatically rebalance your portfolio for you.

Final thoughts

Your original target asset mix is arguably the most important decision when it comes to building your investment portfolio. Over time, as your investments produce different returns, your portfolio drifts away from that initial target, exposing it to risks that might not be compatible with your goals.

Rebalancing your portfolio reduces that risk exposure and increases the likelihood of achieving your desired long-term investment returns. The other benefit of a rebalancing strategy is that it forces you to buy low (i.e. the lagging fund) and sell high (or at least avoid buying as much of the high-performing fund).

Do you have a question about rebalancing your portfolio? Ask away in the comments below:

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  1. Rick on June 11, 2020 at 11:44 am

    Hi Rob, thanks for this. Why do you continue holding TD e-series funds when you could as well use a VBAL or VGRO? I believe e-series may also be a shade pricier than Vanguard.

    • Robb Engen on June 11, 2020 at 12:10 pm

      Hi Rick, so there’s a bit of a legacy reason and a bit of a cost reason. I set up the RESP portfolio at TD (where I banked) 11 years ago when my oldest daughter was born. The e-Series funds were (and still are) of course the cheapest index mutual funds on the market.

      Since I was adding new money every month with relatively small contributions, it made sense to buy commission-free index funds rather than paying $9.95 per trade for ETFs.

      The entire portfolio costs me 0.38% MER versus 0.25% for a Vanguard asset allocation fund. But, again, it’s free to buy mutual funds and relatively easy to maintain my asset allocation.

      Also, keep in mind this is an RESP account and I might be naively thinking it would be best administered at a physical bank (versus a Questrade) when it comes to withdrawals.

      • Rick on June 11, 2020 at 12:35 pm

        I’m with you on that. We started at TD Bank as well, exactly 6 years ago invested in a silly TD-Monthly Income Fund. The advisor at the time suggested a low volatility little risk MF with a relatively low (1.5%) MER. Then I started getting a bit hands on with my investments so moved as-is to TD-DI and converted the same fund to I-series (lower 1.2%) MER. Over the last 5 years, the fund has done “terribly” earning an annualized 1.5% return so just this week, motivated by this great blogger: liquidated ALL my TD-Monthly Income investment, topped up the account utilizing this bloggers maximizer strategy, and this afternoon sensing the low in the market invested over 31K into VBAL! I’m going to keep investing the 209/month for the next 9 years to maximize the 50K contribution/CEB grants and every 6-8 months or a low in the market, spend the 9.99 in trade fee and acquire more VBAL! I’m sure net effect should be much higher than 1.5% annual return i’ve been getting so far. Also, meanwhile if/when WS-trade supports RESPs, i’ll be first to switch over (my RRSPs and TFSA are already with WS-trade)!

        • GYM on June 11, 2020 at 5:57 pm

          Wow thanks for the kind words! I was noticing some visits to my blog lol. Love that CESG money! Great time to dump it in right now while the market is down too.

          • Rick on June 11, 2020 at 6:53 pm

            Great work, GYM. Rob is another of my fav bloggers!

      • Punam on June 11, 2020 at 1:06 pm

        Hi Rob, recently I started reading your post and subscribe as well. Very impressed.
        Last 16 years our all RSP investment is in mutual funds -high MER. Pls. advise how and when to change my portfolio to low MER and better returns. Have certified financial planner from TD wealth to manage our funds, but very disappointed high MER.

        • Robb Engen on June 11, 2020 at 3:37 pm

          Hi Punam, thanks for the kind words. Feel free to get in touch with me on my “contact” page and I can help you.

          There are a few low cost options to consider:

          1.) Stay with TD but insist on TD e-series funds (average MER around 0.40% for a balanced portfolio of four index funds).

          2.) Open a discount brokerage account and invest in ETFs (I’m partial to the all-in-one ETFs like Vanguard’s VBAL or VGRO). You’ll pay an MER of 0.25%:

          3.) Switch to a robo advisor like Wealthsimple who will manage, monitor, and automatically invest & rebalance your portfolio in low cost ETFs. They’ll charge a management fee of between 0.40% and 0.50%, depending on how much you have invested ($100,000 price break), plus the cost of the ETFs (another 0.15% or so):

  2. Erin on June 15, 2020 at 6:01 pm

    Thanks for this post and the reminder about the importance of rebalancing. I also use the TD e-series funds based on the Couch Potato model portfolios, and have been debating rebalancing by adding new funds in my TFSA over the past few months, vs. keeping a bit extra in an emergency fund in case of any COVID related unexpected expenses. I’ve been holding off on RESP contributions this year for the same reason. Do you have any thoughts on the value of adding fuel to investments vs. keeping a larger than usual portion of overall funds aside until the dust settles a bit?

  3. Bill on June 16, 2020 at 12:18 am

    Hi Robb,

    In regards to RRSP’s. If you don’t contribute one year, does your contribution amount carry forward to future years? If you only contribute a portion of your allowed amount, does the unused amount carry over to future years?

  4. Judy on October 6, 2020 at 6:33 am


    I am looking to invest 30,000 CAD in index funds with CA/US/International stock market but am a total newbie. Do I transfer the money into the TD Self Directed TFSA account and then click buy stocks and find my ticker?

    If I rebalance annually, does it cost to sell with TD? It costs $10 per trade when purchasing, correct?

    Do you manually add money to your portfolio every month and choose the ticker that is lagging behind? Is there a way to do it automatically e.g. $600 a month and automatically adds $200 each to each ticker, and then rebalance end of year?

    Also, do you have a recommendation on an International ticker to look out for?

    Your article has been the most clear and appreciate your time!

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