South Korea's financial regulator, the Financial Supervisory Service (FSS), on Wednesday, 9 September conducted raids targeting a journalist who covers the agency, as part of an investigation into alleged stock price manipulation. Investigators searched the reporter's home and their assigned desk in the FSS press room in Seoul, marking a significant escalation in the watchdog's crackdown on media-linked market misconduct.

What the Investigation Involves

According to reports, the probe centres on allegations that the head of an entertainment company colluded with four journalists to publish articles designed to artificially inflate the company's stock price, enabling the parties involved to reap unlawful profits. The FSS special investigation team is also reportedly planning to extend its search to the headquarters of the business news outlet where the journalist is employed.

Notably, the FSS has been investigating four separate stock manipulation cases involving current and former journalists since last year. The latest case is reportedly the only one among the four that has not yet been referred to prosecutors, suggesting the inquiry is at an earlier stage of the legal process.

Paper Industry Cartel Also Penalised

In a separate but concurrent regulatory action, South Korea's fair trade regulator, the Fair Trade Commission (FTC), on the same day imposed a combined fine of 3 billion won (approximately $2.23 million) on six paper manufacturers for rigging supply tenders held by the Farmers Newspaper, a major agricultural publication.

The FTC said the companies colluded in bids conducted by the Farmers Newspaper between 2021 and 2025, agreeing in advance on bid winners, prices, and which firms would submit deliberately losing bids. The commission also decided to refer two of the six companies to prosecutors for further legal action.

Scale of the Price-Fixing Scheme

According to the FTC, the six companies had already been fixing printing paper prices before extending the scheme to the publisher's tender process. The collusion effectively restricted competition and kept winning bids artificially elevated. During the collusion period from 2021 to 2025, winning bids averaged approximately 96.2% of estimated contract prices, peaking at around 99.4%. This compares starkly with an average of 87.6% recorded between 2018 and 2020, when no collusion was in place.

The FTC acknowledged that the six companies derived financial gains through these arrangements and vowed to continue monitoring the paper industry for price-fixing activity, pledging stern action against future violations.

Broader Context and What Comes Next

The FSS journalist raid reflects a broader pattern of South Korean regulators scrutinising the intersection of financial media and market manipulation — a concern that has grown as retail investor participation in Korean equities has surged in recent years. The fact that the watchdog is simultaneously pursuing four separate journalist-linked manipulation cases signals a systemic rather than isolated concern.

As the investigation progresses, the FSS is expected to determine whether the latest case meets the threshold for a prosecutorial referral, a step that would significantly raise the legal stakes for those implicated. The dual regulatory actions on the same day — one targeting market integrity, the other competition law — underscore the South Korean government's intensified focus on financial misconduct across sectors.