The South Korean won gained nearly 8% against the US dollar last month. That puts it among the world's best-performing currencies over the period. The gain came while tech stocks were selling off.
The controlling number
Nearly 8% against the dollar in a single month is the figure the story turns on. The source reports this for last month specifically; no year-over-year or year-to-date comparison is provided. A move of that size, if sustained over a full year, would imply dramatic appreciation in won-denominated assets. Monthly currency surges of this scale rarely hold at that pace, but the single-period number stands on its own.
Why the tech sell-off changes the read
Tech stocks and the currencies of technology-export-heavy economies tend to track each other. A sector-wide sell-off usually weighs on the associated currency. Last month, the South Korean won did the opposite. It gained nearly 8% against the dollar while tech was under pressure, a divergence that separates this move from ordinary monthly currency fluctuations and is the reason the won's performance attracted attention.
Note: The source provides one reported data point (nearly 8% monthly appreciation vs. the USD) and one contextual fact (concurrent tech stock sell-off). No additional figures, named entities, or causal explanations appear in the source material; the article reflects only what the source states.