KORU dropped 27.83% in the past week from $602.99 to $435.20 despite a 139.63% YTD gain and 985% one-year return. The underlying iShares South Korea fund (EWY) fell 8.66% the same week.

Rising oil prices hurt South Korea as a major importer while elevated volatility causes KORUโ€™s daily reset mechanism to compound losses beyond 3x through volatility decay.

The analyst who called NVIDIA in 2010 just named his top 10 AI stocks. Get them here FREE.

A highly-leveraged ETF, Direxion Daily MSCI South Korea Bull 3X ETF (NYSEARCA:KORU) dropped 26% in the past week, pulling back from $602.99 to $446.91, even as the fund sits on a staggering 135% gain year-to-date. Investors have been debating whether KORU is getting punished by macro headwinds hitting South Korea, or whether the 3x leverage mechanism itself is the real culprit.

The answer is both.

Understandably, South Korea is a major oil importer, and WTI crude has climbed 10.3% over the past month to $76.29 per barrel, sitting at the 96th percentile of its 12-month range. However, rising energy costs are pressuring Korean consumers and corporate margins, weighing on the KOSPI. The underlying iShares MSCI South Korea ETF (NYSEARCA:EWY) fell 8.66% over the same week. That's the fundamental story.

READ: The analyst who called NVIDIA in 2010 just named his top 10 AI stocks

But KORU fell more than three times as much, down 27.83%, compared with EWY's 8.66%. This is volatility decay in action. Because KORU resets its 3x exposure daily, it must sell into falling markets and buy into rising ones to maintain its leverage ratio. In a choppy environment, that mechanical rebalancing compounds losses beyond what simple math would predict.

The VIX tells the rest of the story. At 23.57 and sitting in the 87th percentile of its 12-month range, fear is elevated, rising 35.1% in a single month. High-volatility environments are precisely where leveraged ETFs bleed the most, regardless of the underlying's direction.

Discussion of KORU this week has reflected broader investor uncertainty. Sentiment opened at 74 out of 100 (bullish) at midnight, with 46 comments concentrated in the overnight window. By noon, that score had slid to 59 (neutral) as the week's losses became harder to ignore. The intraday drift from bullish to neutral captures the broader tension:

KORU's social sentiment stands at 67/100 (Bullish), driven by strong past momentum but tempered by recent drops and rising volatility. The score showed an intraday slide from bullish to neutral.

ย 

KORU's 1,012% one-year return has attracted momentum chasers who may not fully account for daily decay mechanics in volatile conditions

WTI crude's sharp monthly rebound from a December trough of $55.44 is a structural macro headwind for South Korea, not a temporary one

A 29.17% one-month gain prior to this week's reversal means many recent buyers are already underwater, increasing selling pressure

KORU holds roughly 50% of its weight in EWY with the rest in swap agreements to achieve 3x daily exposure, and this structure performs well in trending, low-volatility rallies. It becomes a drain when the market chops sideways or swings sharply in both directions. The 300% three-month return KORU delivered through late February drew significant capital inflows from U.S. and Korean retail investors. The question now is whether the KOSPI's underlying drivers, semiconductor strength, and reform momentum can reassert a clean directional trend. In elevated-volatility environments, leveraged ETFs with daily reset mechanisms can lose ground to decay even on days when the underlying benchmark closes flat.

Wall Street is pouring billions into AI, but most investors are buying the wrong stocks. The analyst who first identified NVIDIA as a buy back in 2010 โ€” before its 28,000% run โ€” has just pinpointed 10 new AI companies he believes could deliver outsized returns from here. One dominates a $100 billion equipment market. Another is solving the single biggest bottleneck holding back AI data centers. A third is a pure-play on an optical networking market set to quadruple. Most investors haven't heard of half these names. Get the free list of all 10 stocks here.