The South Korean KOSPI index and the DRAM exchange-traded fund experienced a significant decline, with $DRAM falling 12% following reports of a potential windfall profits tax on AI companies. This volatility is attributed to the fund's heavy exposure to Korean memory giants SK Hynix (26% weighting) and Samsung (20% weighting). The sentiment suggests the sell-off may be overblown as the tax proposal originated from a single politician's social media post rather than official policy.