Direxion Daily MU Bull 2X Shares (MUU) plummeted 5.47% intraday on Wednesday, reflecting heightened selling pressure for the leveraged exchange-traded fund.

The sharp decline followed news that the Korea Financial Investment Association convened an emergency meeting with major brokerage CEOs, where participants agreed in principle to tighten investor protection regulations for single-stock leveraged ETFs. Proposed measures include raising the minimum margin threshold significantly and strengthening targeted risk disclosures.

While the regulatory changes primarily target the Korean market, they have dampened global investor risk appetite for leveraged ETF products. As a 2x leveraged ETF tracking Micron Technology, MUU is inherently sensitive to shifts in sentiment surrounding leveraged instruments. The ETF had previously rebounded over 11% in the prior session, making it particularly vulnerable to renewed selling pressure triggered by the regulatory headline.