Why Staying Invested Beats Reacting to Market Volatility

During the peak of the Iran conflict in March 2026, thousands of Australian superannuation members did exactly what their funds advised them not to do. They switched to cash, locking in losses from a 2.9% ASX single-day drop, and then watched the market recover 1.1% in a single session after diplomatic signals emerged. Oil prices swinging from $82 to nearly $120 per barrel, equity markets down roughly 10%, and a flood of alarming headlines created the conditions where doing something felt more responsible than doing nothing. That instinct, however well-intentioned, is precisely the mechanism through which most long-term investment value is destroyed.

This guide explains why reactive behaviour during market volatility costs investors more than the volatility itself, what the evidence from Australia’s biggest super funds reveals about even expert market timing, and what a genuinely durable approach to volatile markets looks like for Australian investors in 2026.

The crisis playbook that keeps failing Australian investors

On 9 March 2026, the ASX recorded its worst single-day decline in 11 months, falling 2.9% as the Strait of Hormuz closure sent oil prices surging and headlines into overdrive. Superannuation members responded predictably. Switching requests to cash options surged, as thousands of Australians locked in their losses at the worst possible moment.

Then the reversal came. After US President Trump signalled conflict-resolution intent, the S&P/ASX 200 rebounded 1.1% in a single session. Members who had switched to cash missed it.

The sequence is not new. It followed the same three-stage cycle that played out during COVID-19 in 2020, and during the Global Financial Crisis before that:

• A sharp market decline triggers anxiety and a sense that action is necessary
• Members switch to cash or conservative options, crystallising losses
• Markets recover before the same members re-enter, widening the gap between market returns and their personal returns

Balanced superannuation options fell approximately 3.2% for March 2026, their worst monthly result since 2022. Yet the monthly figure told only part of the story.

APRA’s quarterly superannuation industry data, published as of December 2025, provides the official baseline for tracking member switching activity and fund-level asset movements across Australia’s superannuation system, the same dataset that contextualises the scale of cash-switching behaviour observed during the March 2026 volatility episode.

AustralianSuper reported positive year-to-date returns despite the March drawdown, reinforcing that short-term volatility had not erased the broader gains accumulated earlier in the year.

The pattern is structural, not situational. Recognising it as a recurring human tendency, rather than a rational response to unique circumstances, is the first step toward resisting it. The instinct to act during a sharp decline is better understood as a signal to pause.

The instinct to protect savings by moving to cash carries its own hidden cost: with Australia’s headline CPI reaching 4.6% for the 12 months to March 2026, real returns on cash holdings are negative after inflation, meaning the perception of safety comes with a documented and measurable purchasing power penalty.

What Australia’s biggest funds reveal about the limits of expert timing

If anyone should be able to time markets successfully, it is the investment teams at Australia’s largest superannuation funds. They employ hundreds of analysts, have access to institutional-grade data, and manage portfolios worth hundreds of billions of dollars. The evidence from 2026, however, suggests even they struggle.

In remarks reported by Investment Magazine in March 2026, AustralianSuper’s departing Chief Investment Officer publicly acknowledged regret over underweighting artificial intelligence and digital sector stocks from around 2022. The decision was itself a timing call, a bet that those sectors were overvalued or that capital would be better deployed elsewhere. Simply holding benchmark-level exposure would have captured the majority of the gains the fund missed.

The structural irony is significant. The same institution advising members not to make reactive decisions had itself made a directional allocation choice that underperformed a passive benchmark. Australian super funds collectively allocated an estimated $143 billion toward AI-related investments by late 2025, according to the Australian Financial Review, suggesting the sector’s underweighting was eventually reversed, but only after the opportunity cost had compounded.

When “harvesting volatility” means nothing you can measure

During the Iran conflict, fund communications to members employed language that sounded strategic but offered no testable prediction:

• “Harvesting volatility”: implies the fund is profiting from price swings, but provides no measurable benchmark members can use to assess whether this was achieved
• “Raising liquidity to exploit opportunities”: suggests the fund is building cash to buy at lower prices, but does not specify what would be bought, at what price, or when
• “Maintaining long-term positioning”: means the fund has not changed strategy, which may be the right call, but is presented as an active choice rather than the default it often is

According to the Australian Financial Review in April 2026, some funds raised equity allocations during the conflict while others built cash reserves. Both approaches were described publicly as strategic. Neither was presented with a falsifiable framework that members could later use to evaluate whether the call was correct.

ASIC’s review of super trustee communications, published in October 2025, identified glaring gaps in how funds explain investment decisions to members, including a tendency toward one-size-fits-all messaging that lacks the specificity members would need to evaluate whether a stated strategy was actually executed.

If institutions with these resources cannot consistently time markets, the case for retail investors attempting the same, with less information, higher transaction costs, and more emotional proximity to their savings, is considerably weaker.

How reactive trading silently erodes your investment returns

The cost of reactive trading during volatile periods is rarely visible on a single statement. It accumulates through three distinct channels, each of which peaks precisely when the temptation to trade is strongest.

These costs compound silently over time. Inside pooled superannuation structures, individual transaction activity is not itemised for members, which means the cumulative drag from switching behaviour during volatile periods remains largely invisible. No publicly available APRA-level data currently breaks down these costs in a way that allows members to assess the total impact of their switching decisions.

The scale of emotional investing costs becomes concrete in platform-level data: trading volumes on Selfwealth by Syfe doubled during the April 2025 US tariff announcement, and in FY 2024 Australian retail CFD investors collectively lost more than $458 million, with 68% of participants recording losses according to ASIC REP 828.

Some of the largest funds have themselves acknowledged, in their own communications during the March 2026 period, that refraining from action is frequently the optimal response during elevated turbulence. That concession is significant. When the institutions managing the money say that doing nothing is often the best strategy, the evidence against reactive trading becomes difficult to dismiss.

How markets actually process geopolitical shocks (and why you cannot outrun them)

The Strait of Hormuz closure on 4 March 2026 offers a precise illustration of how quickly geopolitical information moves into asset prices. Oil was trading at $80-$82 per barrel on 2 March. Within days of the closure, prices had escalated to nearly $120 per barrel at peak. Intraday swings of 5-10% occurred on specific trading days during the conflict period. Gold traded in a range of approximately $5,001-$5,417 per ounce during March, reflecting the breadth of volatility across asset classes.

The speed of that repricing is the structural problem for any investor attempting to react. In markets with millions of participants processing identical information simultaneously, the price already reflects the consensus view by the time a retail investor reads the headline and considers acting.

The sequence makes this concrete:

1. A geopolitical event occurs (the Strait of Hormuz closure)
2. Institutional traders and algorithmic systems reprice affected assets within seconds to minutes
3. Financial media reports the price movement and the event
4. A retail investor reads the headline, checks their portfolio, and considers switching to cash

The gap between step two and step four is where the opportunity disappears. By the time the decision to act feels urgent, the market has already moved.

CommBank economists Belinda Allen, Dhar, and Cartwright emphasised that the economic impact of the conflict would be duration-dependent: disruptions lasting weeks would carry manageable consequences, while disruptions lasting months would create sustained inflation and growth headwinds for Australia.

Even professional forecasters, with direct access to macroeconomic modelling, resisted making directional calls on the conflict’s resolution timeline. If they could not predict whether the disruption would last weeks or months, the basis for a retail investor to make a portfolio decision in real time is thinner still. Waiting for clarity before acting is not a cautious approach; the clarity, when it arrives, is already priced in.

Systematic investing strategies that automate allocation decisions remove the most dangerous link in the chain: the moment where a volatile headline and an anxious investor intersect, with $6.9 billion flowing into global equity ETFs from Australian investors in Q1 2026 despite simultaneous RBA rate hikes and commodity shocks, the structural shift toward rules-based approaches is increasingly visible in flow data.

What a genuinely durable Australian investment strategy looks like

The alternative to reactive trading is not passive resignation. It is a deliberate framework built to capture long-term market returns while removing the decision points where behavioural errors are most likely.

That framework has four components, each of which can be applied by Australian investors through superannuation fund selection or ASX-listed exchange-traded funds (ETFs):

1. Broad diversification across asset classes and geographies. Holding Australian equities, international equities, bonds, and property within a single balanced option or through a combination of ETFs reduces the impact of any single sector or regional shock. The March 2026 energy price surge hurt consumer-facing stocks but benefited energy and mining holdings within the same diversified portfolio.
2. Cost minimisation. Lower management fees and fewer transaction costs compound into meaningfully higher returns over decades. Selecting a low-cost index option within a superannuation fund, or using ASX-listed index ETFs for outside-super investments, directly reduces the drag on long-term returns.
3. Systematic rebalancing. A disciplined, calendar-based rebalancing approach (quarterly or annually) mechanically enforces the discipline of selling what has risen and buying what has fallen, without requiring a market view or emotional decision.
4. Removal of the decision to respond to headlines. The single most valuable feature of a passive, diversified strategy is what it eliminates: the moment where a volatile headline meets an anxious investor and produces a trade.

Bell Financial Group’s CIO Will Riggall, in a market wrap on 13 March 2026 covering Iran conflict impacts, implicitly favoured diversification over attempts to time the market, a position consistent with the structural evidence.

Why most Australian investors are already moving this way

The data suggests Australian investors are increasingly voting for this approach with real money. The Australian ETF market recorded a record $48.3 billion in inflows during 2025, with passive strategies clearly dominant. Passive ETFs attracted approximately $7.7 billion quarterly compared with approximately $2.5 billion quarterly for active ETFs.

That growth trajectory continued into 2026 despite the Iran conflict volatility. Passive strategies maintained leadership in net inflows, consistent with a longer-term structural shift in Australian retail investor behaviour toward lower-cost, index-based approaches. This is not trend-following. It is a rational structural response to the accumulated evidence on active management costs and outcomes.

Investors ready to move from principle to structure will find our full explainer on ASX portfolio construction for volatile markets covers the three-layer framework in detail: a cash buffer for near-term protection, income-generating bonds for yield, and diversified equities for long-term growth, with worked examples drawn from the March 2026 period when Australian ETF investors committed $5.6 billion to the market even as the ASX fell 7.8%.

Staying invested is the strategy, not the absence of one

The greatest threat to long-term investment returns during volatile periods is not the market decline itself. It is the behavioural response to it. The March 2026 episode demonstrated this with uncomfortable clarity: members who switched to cash during the 2.9% ASX drop on 9 March locked in losses and faced the risk of missing the 1.1% rebound that followed days later.

Staying invested when headlines are alarming is genuinely difficult. The anxiety is real, and the impulse to protect savings is understandable. The evidence, however, consistently points in one direction. Inaction, within a well-structured portfolio, is the strategy that preserves the most value over time.

A practical step for Australian investors: check whether superannuation savings are in a low-cost, diversified balanced or index option, and whether holdings outside super reflect the same principles. If they do, the framework is already in place.

The investors who fared best during March 2026 were, by most accounts, those who did not check their balances daily and did not act. That is not complacency. It is discipline.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors.