How Cash ETFs Put Your Idle Cash to Work

Many investors face the same question: how do you keep cash available for opportunities without letting it sit idle and earn nothing? Cash exchange-traded funds (ETFs) are an increasingly popular solution. They let investors hold liquid assets while collecting a modest return, and demand for these products has grown across age groups as people look for flexibility and safety in their short-term holdings.

There are several varieties of cash ETFs. Some place deposits in high-interest savings accounts at major banks, while others invest in low-risk debt instruments and short-term securities—commonly marketed as money market ETFs. These funds aim to preserve capital and deliver liquidity, making them an alternative to guaranteed investment certificates (GICs), which typically lock funds for a fixed term. As Merrick Financial founder Chris Merrick explains, cash ETFs offer liquidity and interest income that can outperform a standard bank savings account, and they are often used to meet short-term financial goals.

One practical feature of many cash ETFs is that they distribute interest monthly, and their yields tend to track prevailing borrowing costs, which are influenced by the Bank of Canada’s policy rate. That means when policy rates fall, yields on cash ETFs generally decline as well. Investors should expect returns to move in step with the broader interest-rate environment.

At BMO Global Asset Management, Erika Toth, director and head of ETF and portfolio consulting, notes that one of the firm’s best-selling products over the past year has been a money market ETF. While these funds typically offer lower yields than longer-term fixed-income products, they serve a distinct role: de‑risking a portfolio and providing a conservative place to park cash when investors want to step out of equities or bonds. Because cash ETFs are less volatile than stocks, they are often used as a defensive holding when market uncertainty rises.

Liquidity and returns without market exposure

Cash ETFs can be particularly useful during transitions. For investors approaching retirement or those who need steady cash flow, moving some assets into cash-like instruments can reduce volatility and increase certainty around short-term needs. Younger investors also find cash ETFs useful when saving for specific near-term goals—down payments on homes, renovations, or education expenses—because the funds remain accessible while earning some interest.

IG Wealth Management’s chief investment strategist Philip Petursson advises that cash ETFs are appropriate anytime an investor requires cash within a 12‑month horizon and wants to avoid exposure to market swings. They offer a straightforward way to earn a yield while keeping funds liquid. However, he cautions that over the long term, holding too much cash can hinder growth because cash returns typically lag the higher returns available from equities or longer-duration bonds. Petursson suggests that a modest allocation—around 5% of a portfolio—can provide a reserve to deploy during market volatility without significantly weighing down long-term performance.

Investors should also weigh differences in protection and risk. Unlike deposits held directly at Canadian banks, many cash ETFs are not covered by the Canada Deposit Insurance Corporation (CDIC), which insures eligible bank deposits up to certain limits. For some investors, CDIC coverage is an important security feature; for others, the liquidity and convenience of a fund structure outweigh the lack of deposit insurance. As Merrick points out, the probability of needing full insurance protection may be low for many investors, but individuals should consider their own risk tolerance and priorities.

In short, cash ETFs can fill an important niche in a diversified portfolio: they provide immediate access to funds, offer a better return than a typical savings account in many environments, and serve as a conservative option during periods of market uncertainty. They are most suitable for short-term holdings, emergency reserves, or tactical allocations to be deployed when markets present buying opportunities. As with any investment, investors should assess fees, underlying holdings, and how a cash ETF fits into their overall plan before allocating funds.

Read more about ETFs:

• Which ETFs are the most tax-efficient for Canadian investors?
• Single-stock ETFs: Approach with caution
• Mutual funds vs. ETFs: What you need to know to decide what investment works for you
• Best cash-alternative ETFs