Shares of Zalando SE fell sharply after Germany's financial regulator launched an investigation into the online fashion retailer's 2025 report. The probe centers on suspected violations of accounting rules that could impact the company's financial reporting and investor confidence.

The timing of the regulatory action raises immediate concerns for investors who have been tracking the company's expansion and profitability metrics. While the specific accounting irregularities remain unclear, any probe into financial reporting typically signals serious compliance issues that markets view as material risks.

For Zalando, this investigation adds pressure to already challenging market conditions in the European e-commerce sector. The company has been navigating economic uncertainty and shifting consumer spending patterns, making regulatory scrutiny an unwelcome distraction from core business operations.

The stock decline reflects investor wariness toward companies facing regulatory investigations, particularly in the financial services sector where compliance failures can lead to significant penalties and reputational damage.