Investor anxiety is running high on both sides of the Pacific as recent data from the United States and South Korea reveal a surge in short-selling activity and bearish sentiment not seen in years. On April 7, 2026, the U.S. stock market’s ROBO put/call ratio—a key indicator of investor mood—soared to 1.0, according to BeInCrypto. This figure not only surpasses the levels seen during the 2008 financial crisis (0.91) and the 2020 pandemic (0.95), but also signals an atmosphere of extreme fear among market participants.
To put it simply, the ROBO put/call ratio compares the volume of put options (bets the market will fall) to call options (bets it will rise) purchased by individual investors. A value of 1.0 means puts and calls are being bought in equal measure, a rare event that underscores just how nervous people are. As BeInCrypto put it, “The current figure means individual investors are buying puts and calls at almost the same level,” and described the market as being in a phase where “fear sentiment is becoming excessive.”
Institutional investors aren’t feeling much braver. Short-selling proportions for the S&P 500, Nasdaq 100, and Russell 2000 indices have climbed to approximately 3.7%, 2.7%, and 5.0% respectively. These are the highest readings in 11, 6, and 15 years, marking the most pronounced bearish positioning since the 2010-2011 European debt crisis, according to BeInCrypto’s analysis. In other words, it’s not just one sector or a handful of stocks facing skepticism—bearish bets are spreading across the entire market.
The mood is so bleak that the CNN Fear & Greed Index, another widely watched barometer, dropped to 23 on April 7, 2026. That’s deep into the “extreme fear” territory—a clear sign that investors are rattled. Meanwhile, hedge funds have ramped up their global stock short-selling to the most aggressive level in 13 years, with sell positions now 7.6 times larger than buy positions, according to the same report.
This isn’t just a U.S. story. South Korea’s markets are also seeing elevated levels of short-selling, though the dynamics are a bit different. On April 8, 2026, the total short-selling trading value in South Korea reached 2.4074 trillion won, accounting for 3.13% of total trading volume, according to KRX data reported by TopStarNews. That figure was down by about 41 billion won from the previous trading day, but the overall proportion remains historically high.
Breaking it down further, the KOSPI index saw 1.8176 trillion won in short-selling trades (3.08% of trading volume), a slight dip from the previous day’s 2.0993 trillion won. KOSDAQ, on the other hand, recorded 589.8 billion won in short-selling (3.30%), up from 349 billion won. The short-selling structure in Korea is dominated by foreign investors and institutions, who together account for the vast majority of activity. Individuals, by contrast, make up about 1% or less of the market—a stark difference from the more retail-driven U.S. environment.
Some stocks are drawing especially intense attention from short sellers. On the KOSPI, the top five by trading value were Samsung Electronics (224.3 billion won), SK Hynix (201.1 billion won), Hanmi Semiconductor (98.1 billion won), Samsung Electro-Mechanics (68.3 billion won), and Hyundai Motor (59 billion won). Over on the KOSDAQ, L&K Precision (33.1 billion won), ISC (25.2 billion won), Wonik IPS (21.8 billion won), Dongjin Semichem (20.5 billion won), and EO Technics (17.1 billion won) led the pack.
But it’s not just about the total value of short-selling trades. Some companies are seeing a remarkably high percentage of their trading volume coming from shorts. HD Hyundai Marine Solutions topped the KOSPI with a short-selling ratio of 40.19%, followed by LX Semicon (34.92%), Miwon Sangsa (34.40%), GKL (29.21%), and S-1 (29.18%). On the KOSDAQ, KM Double U (35.91%), Medytox (34.90%), Sears Technology (25.23%), and Dongjin Semichem (24.22%) stood out.
Short-selling balances (on a T-2 basis, meaning two days after the transaction) also point to where the biggest bearish bets are being placed. Hyundai Motor led the KOSPI with a balance of 1.5807 trillion won, trailed by Hanmi Semiconductor (1.5226 trillion won) and LG Energy Solution (1.2441 trillion won). On the KOSDAQ, EcoPro (912.9 billion won), EcoPro BM (498.7 billion won), and HLB (475.6 billion won) were the top names. As of April 7, 2026, two KOSDAQ stocks—Saebitchem and Razorcell—were officially designated as short-selling overheated stocks, meaning trading restrictions may be imposed to prevent excessive volatility.
What’s behind this global surge in bearishness? Analysts point to a combination of economic uncertainty, geopolitical tensions, and persistent inflationary pressures. In the U.S., the simultaneous spike in short-selling across all major indices is particularly notable. According to BeInCrypto, “The fact that all three major indices are recording high short-selling levels at once suggests that bearish bets are spreading across the entire market, not just specific sectors.” Hedge funds, for their part, have been especially aggressive, with recent data showing their short positions outnumbering long positions by a factor of 7.6.
Yet, there’s a twist to the story. Some market watchers believe this extreme fear and the piling up of short positions could set the stage for a sudden rally—if even a small piece of good news emerges. As BeInCrypto notes, “With both individual and institutional investors reaching extremes in fear and bearish positioning, there is analysis that a sharp rally could occur due to large-scale short-covering in response to any positive development.” In plain English: when everyone is betting on a fall, a little optimism can send prices rocketing upward as short sellers scramble to cover their positions.
In South Korea, the structure of the short-selling market—dominated by foreign and institutional investors—means that local events, regulatory changes, or global shifts can quickly ripple through the most heavily shorted stocks. The fact that some stocks are seeing over 30% of their trading volume coming from short sales is a testament to both the sophistication and the nerves of market participants.
For now, both American and Korean investors are watching the markets with a mix of trepidation and anticipation. Will the current climate of fear give way to a dramatic rebound, or is it a sign of deeper troubles ahead? As always in finance, only time will tell, but the stage is set for volatility—and perhaps, for some, opportunity.