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SHAREHOLDER CLASS ACTIONS IN AUSTRALIA: UNCERTAINTY FOR THE FUTURE OF MARKET-BASED CAUSATION

SHAREHOLDER CLASS ACTIONS IN AUSTRALIA: UNCERTAINTY FOR THE FUTURE OF MARKET-BASED CAUSATION

The following article was contributed by Nikki Stever and Madison Smith of Australia-based commercial law firm, Piper Alderman. In the third decision delivered in a shareholder class action in Australia,[1] Iluka Resources Limited (ASX: ILU), (Iluka) succeeded in its defence of a lawsuit[2] which failed to prove that the shareholders’ direct reliance on Iluka’s conduct caused their losses. However, the decision in favour of Iluka notably lacked any significant consideration of the second causation argument typically pleaded in shareholder class actions – market-based causation. Background of the matter Iluka is a large mining company and global supplier of mineral sand products. On 9 July 2012, Iluka revised its sales guidance for its products, resulting in a 25% drop in share price. The shareholders alleged that Iluka’s sales guidance leading up to its announcement:
  1. was misleading or deceptive; and
  2. breached their continuous disclosure obligations.
The lead applicant purported that reliance on the sales guidance impacted their decision to purchase shares in the company (direct reliance).  It is not clear to the authors if the lead applicant or shareholders pleaded that the market as a whole was impacted by the sales guidance (market-based causation). The Federal Court of Australia (FCA) rejected both claims on the basis that the representations alleged were not actually made, and were merely statements/guidance about Iluka’s expectations and were not guarantees or predictions/forecasts of future performance. The FCA also found that the lead applicant relied on various external stock reports rather than statements made by Iluka, causing the direct reliance case to fail. Direct reliance and market-based causation Direct reliance in a shareholder class action requires the claimant to prove they actually relied on the contravening conduct (i.e. statements) when deciding to acquire shares in the defendant company, and that the subsequent decrease in share price was directly related to the contravening conduct, resulting in loss to the shareholder. Market-based causation is based on establishing that the price that the defendant’s shares traded on the market was inflated by the contravening conduct, such that the claimant prima facie suffered loss by paying an increased price for the shares. The Court has accepted this proposition,[3] however, also suggested that it may still be necessary for individual shareholders to give evidence that, but for the contravention by an entity, they would not have purchased the shares (or not at the price paid) in order to establish loss.[4] Causation and loss in Iluka Because the Court found that no representations were made (and therefore they were not capable of being relied upon, either directly or by the market), the judgment was relatively quiet in relation to causation. While there is reference to the failed direct reliance case, in so far as it was held that the lead applicant did not rely on the sales guidance issued by Iluka when deciding to purchase the shares, unusually the judgment is completely silent on market-based causation. In previous cases where market-based causation has been alleged by the plaintiff, the but for test has been discussed by the FCA in the context of considering misleading or deceptive conduct claims.  For example, the alleged contraventions in Myer and Re HIH were assessed by considering whether the alleged loss would not have occurred but for the contraventions.[5] The High Court in Australia has offered an alternative approach in cases of proving factual causation of misleading and deceptive conduct generally – the ‘a factor’ test.[6] The a factor test is satisfied if the misleading or deceptive conduct was a factor in the occurrence of the plaintiff’s loss, or in other words materially contributed to the plaintiff’s loss. In Iluka, this test for market-based causation would be satisfied if the alleged contraventions materially contributed to the shareholders’ loss, rather than the more stringent test of whether the contraventions were necessary for the loss. The a factor test, if adopted, arguably offers a more appropriate test for market-based causation in cases of misleading or deceptive conduct. Firstly, it is more reliable and intuitive.[7] For example, the but for test requires counterfactual speculation as to how a market would have responded but for a particular event. This can be a difficult exercise for a plaintiff to speculate and quantify the loss. The a factor test shifts the requirements from necessity to contribution and is not as easily defeated by a claim that it was not the only factor relevant to the plaintiff’s loss. Secondly, the test also avoids duplicative causation, as market-based causation often involves multiple factors that could have affected share prices.[8] The court does not need to assess each separate factor and consider its relative relevance to the causal loss overall, as is required when assessing the causal conduct following the but for test. Finally, the a factor test promotes the deterrence of all misleading or deceptive conduct by providing a broad opportunity for the conduct to be considered misleading or deceptive, regardless of whether it was necessary for the loss.[9] Conclusion By failing to address market-based causation, the Iluka decision has created uncertainty around what causal test the court would be willing to accept for shareholders to succeed with a market-based causation claim. It is only a matter of time before there is a substantial decision on this point, however, until this occurs, the law on market-based causation remains unsettled. About the Authors Nikki Stever, Special Counsel  — Nikki specialises in complex litigation and disputes, with an emphasis on class actions and disputes involving corporations, competition and consumer legislation and disputes concerning breaches of trust and fiduciary duties. Nikki frequently works with litigation funders and is experienced in the structuring and conduct of funded litigation, across all Australian jurisdictions. Madison Smith, Lawyer  — Madison is a litigation and dispute resolution lawyer at Piper Alderman with a primary focus on corporate and commercial disputes. Madison is involved in a number of large, complex matters in jurisdictions across Australia. For queries or comments in relation to this article please contact Kat Gieras, Litigation Group Project Coordinator | T: +61 7 3220 7765 | E:  kgieras@piperalderman.com.au — [1] Following Crowley v Worley Limited [2020] FCA 1522 and TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [2] Bonham v Iluka Resources Ltd [2022] FCA 71. [3] In the matter of HIH Insurance Limited (In Liquidation) [2016] NSWSC 482; TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [4] TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747, [1671]. [5] In the matter of HIH Insurance Limited (In Liquidation) [2016] NSWSC 482; TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [6] Henville v Walker [2001] HCA 52, [61] and [106]. [7] Henry Cooney, Factual causation in cases of market-based causation (2021) 27 Torts Law Journal 51. [8] Ibid. [9] Ibid.

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France Issues Decree Regulating Third-Party Funded Collective Actions

By John Freund |

France has taken a significant step in codifying oversight of third-party financed collective actions with the issuance of Decree No. 2025-1191 on December 10, 2025.

An article in Legifrance outlines the new rules, which establish the procedure for approving entities and associations authorized to lead both domestic and cross-border collective actions—referred to in French as “actions de groupe.” The decree brings long-anticipated regulatory clarity following the April 2025 passage of the DDADUE 5 law, which modernized France’s collective redress framework in line with EU Directive 2020/1828.

The decree grants authority to the Director General of Competition, Consumer Affairs and Fraud Control (DGCCRF) to process applications for approval. Final approval is issued by ministerial order and is valid for five years, subject to renewal.

Approved organizations must meet specific governance and financial transparency criteria. A central provision of the new rules is a requirement for qualifying entities to publicly disclose any third-party funding arrangements on their websites. This includes naming the financiers and specifying the amounts received, with the goal of safeguarding the independence of collective actions and protecting the rights of represented parties.

Paul de Servigny, Head of litigation funding at French headquartered IVO Capital said: “As part of the transposition of the EU’s Representative Actions Directive, the French government announced a decree that sets out the disclosure requirements for the litigation funding industry, paving the way for greater access to justice for consumers in France by providing much welcomed clarity to litigation funders, claimants and law firms.

"This is good news for French consumers seeking justice and we look forward to working with government, the courts, claimants and their representatives and putting this decree into practice by supporting meritorious cases whilst ensuring that the interests of consumers are protected.”

By codifying these requirements, the French government aims to bolster public trust in group litigation and ensure funders do not exert improper influence on the course or outcome of legal actions.

Privy Council to Hear High-Profile Appeal on Third-Party Funding

By John Freund |

The United Kingdom's Judicial Committee of the Privy Council is set to hear a closely watched appeal that could have wide-ranging implications for third-party litigation funding in international arbitration. The case stems from a dispute between OGD Services Holdings, part of the Essar Group, and Norscot Rig Management over the enforcement of a Mauritius-based arbitral award. The Supreme Court of Mauritius had previously upheld the award in favor of Norscot, prompting OGD to seek review from the Privy Council.

An article in Bar & Bench reports that the appeal is scheduled for next year and will feature two prominent Indian senior advocates: Harish Salve KC, representing Norscot, and Nakul Dewan KC, representing OGD. At issue is whether the use of third-party funding in the underlying arbitration renders the enforcement of the award improper under Mauritius law, where third-party litigation funding remains a legally sensitive area.

The case is drawing significant attention because of its potential to shape the international enforceability of funding agreements, particularly in light of the UK Supreme Court's 2023 PACCAR decision. That ruling dramatically altered the legal landscape by classifying many litigation funding agreements as damages-based agreements, thereby subjecting them to stricter statutory controls. The PACCAR decision has already triggered calls for legislative reform in the UK to preserve the viability of litigation funding, especially in the class action and arbitration contexts.

The Privy Council appeal will test the legal boundaries of funder involvement in arbitration and may help clarify whether such arrangements compromise enforceability when judgments cross borders. The outcome could influence how funders structure deals in jurisdictions with differing attitudes toward third-party involvement in legal claims.

Banks Win UK Supreme Court Victory in $3.6B Forex Lawsuit

By John Freund |

Several major global banks, including JPMorgan, UBS, Citigroup, Barclays, MUFG, and NatWest, have successfully blocked a £2.7 billion ($3.6 billion) opt-out collective action in the UK’s Supreme Court. The proposed lawsuit, led by Phillip Evans, aimed to represent thousands of investors, pension funds, and institutions impacted by alleged foreign exchange (forex) market manipulation.

An article in Yahoo Finance reports that the case stemmed from earlier European Commission findings that fined multiple banks over €1 billion for operating cartels in forex trading. Evans’ action, filed under the UK’s collective proceedings regime, sought to recover damages on behalf of a wide investor class. However, the Supreme Court upheld a lower tribunal’s decision that the claim could not proceed on an opt-out basis, requiring instead that individual claimants opt in.

The judgment emphasized the insufficient participation rate among potential class members and found that an opt-out mechanism was not appropriate given the specifics of the case. Justice Vivien Rose, delivering the court’s opinion, noted that while individual claims might have merit, the representative structure lacked the cohesion and commitment necessary to justify a mass claim. As a result, the banks have succeeded in halting what would have been one of the largest collective actions in the UK to date.