KORU, the Direxion Daily MSCI South Korea Bull 3X Shares ETF, has become one of the most unusual lending-market stories in the leveraged-ETF space this week — with short interest climbing at a pace that doesn't square with available float, and options traders pivoting sharply toward calls.
The positioning story here is extraordinary, and it requires a note of context before the numbers land. Reported short interest has surged to over 1,100% of the fund's free float, an arithmetic result of how leveraged ETF share creation and lending interact rather than a straightforward bearish pile-on. What is unambiguous is the direction and speed: shares short jumped more than 1,140% in a single week, from roughly 1.1 million to over 16 million. A month ago the figure was around 380,000 shares. Something structural shifted abruptly around July 14-15, when short interest leapt from just over 1 million to 5.4 million in a single session, then continued climbing. The ORTEX short score is running at 71.8, a level it has held with minimal variation for the past two weeks — suggesting the model is pricing in sustained, elevated short-side pressure rather than a transient spike.
The borrow market tells a story of tightening that predates last week's share-count explosion. Availability was completely exhausted — at 0% — for four consecutive sessions between July 8 and July 13, meaning every share in the lending pool was already lent out. It has since recovered to 52.9%, partly because new shares were created into the ETF structure, loosening supply. Cost to borrow has eased from a July 9-10 peak near 13.8% to 10.7% now, though it remains 71% higher than a month ago and well above the sub-7% range that prevailed in mid-June. That cost level — above 10% for a product that resets daily and bleeds value through compounding — makes holding short positions expensive, but the scale of new short positions opened this week suggests traders are absorbing that cost deliberately.
Options positioning has shifted in the opposite direction, and the contrast is the most interesting tension in this setup. The put/call ratio has dropped to 0.95, more than one standard deviation below its 20-day average of 1.35. For most of June, the PCR was running at 1.5 to 2.1 — a notably defensive tilt in the options market. That protection buying has unwound sharply. The 52-week PCR range is 0.0 to 2.6, and the current reading is toward the lower end, implying that options traders are now expressing more bullish intent — or at least less hedging demand — precisely as short interest in the lending market is at multi-month highs. Two sides of the same trade are pointing in opposite directions.
The price action adds another layer of tension. KORU gained 18% on July 21 alone, its best single-day move in recent memory, after falling 60% over the prior month. A 3x leveraged product will amplify any underlying move in Korean equities, and the South Korean market has been volatile. The one-week performance is still down nearly 10%, so yesterday's bounce came after a brutal stretch. With no upcoming earnings event — this is an ETF — and no analyst coverage to triangulate, the key variables to monitor are the pace of further share creation or redemption in the fund (which directly affects the lending pool and reported short interest), whether borrow availability tightens back toward zero, and whether the options PCR reverts toward its recent defensive mean or confirms a sustained shift in sentiment.
See the live data behind this article on ORTEX.
Open KORU on ORTEX →ORTEX Market Intelligence content is generated by AI from a snapshot of ORTEX's proprietary data. Content is informational only and does not constitute investment advice.
