Samjeonix, SMH Slip as Treasury Yields Rise

That matters because higher U.S. yields raise the discount rate on growth stocks and pull capital toward fixed income, a double hit for the AI and chip trade that has been one of the market’s main momentum engines. In South Korea, the “Samjeonix” basket is especially exposed: foreign selling in local equities tends to intensify when U.S. rates rise, since global investors can get better risk-adjusted returns in Treasuries and other dollar assets.

The pressure is showing up across the semiconductor complex. Nvidia rose to $227.33 on Sept. 2 after a volatile week, while Taiwan Semiconductor Manufacturing slipped to $412.86 from recent highs. The VanEck Semiconductor ETF, SMH, fell to $552.44, with its conventional technical indicators weakening as the stock sits below its recent peak and its 50-day moving average trend has softened.

The macro backdrop is also turning less friendly for Asia risk assets. Japan’s 30-year government bond yield touched 3%, its highest in three decades, while the yen weakened and Tokyo floated a record $895 billion budget for fiscal 2027. That combination points to rising global borrowing costs, firmer inflation expectations and a harder environment for leveraged or long-duration trades.

Adalytica’s U.S. dollar trade signals remain neutral, but FX volatility readings show fear, underscoring how quickly cross-asset stress can spill into equities. For investors, the key question is whether AI-led chip names can keep outperforming as Treasury yields climb — or whether a further rise in U.S. rates turns foreign demand into a headwind for Korea’s market darling.

The next catalyst is the bond market itself: if Treasury yields break higher again, foreign selling pressure on U.S. debt and high-beta Asian tech could accelerate, while any pullback in oil or easing Middle East risk may give the “Samjeonix” trade room to stabilize.