The real "black swan" has arrived — the market is preparing for catastrophic scenarios! A textbook bubble emerges in South Korea
The Iran conflict has already triggered turmoil in global stock markets, with some major indices—including South Korea—falling into technical correction territory.
However, the main U.S. stock indices have not only remained resilient, but have also outperformed their international peers since February 28, when the U.S. and Israel began bombing Iran. According to FactSet data, the S&P 500 index was only about 4% from its all-time high in intraday trading on Wednesday, despite closing with a slight decline that day. In contrast, South Korea's Kospi Composite Index has dropped more than 10% since early March. U.S. Bank stock strategists indicate that the extreme volatility in Korean equities is starting to exhibit characteristics of a “textbook bubble.”
Interactive Brokers Securities Chief Strategist Steve Sosnick said: “Closure of the Strait of Hormuz has always been considered a true ‘black swan’ event, but the reaction we're currently seeing across various assets is far from the levels the market originally feared.”
However, a quick look at some corners of the U.S. stock options market shows a slightly different picture. Nomura cross-asset strategist Charlie McElligott points out that options traders tied to large-cap tech stocks and ETFs tracking the Nasdaq 100 appear to be preparing for “catastrophic” scenarios.
McElligott said in comments provided to MarketWatch on Wednesday: “Stock options skew (especially in mega-cap tech stocks/the ‘U.S. Big 7’) continues to be extremely tilted toward downside protection and out-of-the-money ‘crash-type’ left-tail hedging, while ‘nobody is holding right-tail positions.’”
In financial market terms, “left-tail” outcomes refer to severe crashes; “right-tail” outcomes imply significant rallies.
Through a series of charts, McElligott illustrates that the demand for out-of-the-money put options on the “U.S. Big 7” and the Invesco QQQ Trust (QQQ) has surged significantly, compared with out-of-the-money call options and near-the-money puts.
A collage of eight line charts shows the historical percentiles of skew and volatility for the “U.S. Big 7” and QQQ stocks, covering the period from May 2025 to March 2026.

(Source: McElligott)
Traders use “out-of-the-money” options to bet on or hedge against sharp moves in a portfolio in either direction. The “U.S. Big 7” includes: Microsoft, Nvidia, Amazon, Tesla, Apple, Alphabet, and Meta Platforms. QQQ aims to track the Nasdaq 100 index.
Puts and calls give the holder the right, but not the obligation, to sell or buy the underlying asset at a predetermined price before a certain expiration date, respectively. “At-the-money” options refer to contracts whose strike price is equal to or close to the asset’s current trading price.
This creates an asymmetric opportunity, as McElligott describes: for investors bold enough to bet on a major rebound, it's now possible to sell an out-of-the-money put option and receive enough premium to even cover the cost of buying a call option. The Nomura strategist also specifically listed the most attractive combinations:

(Source: Nomura)
A table shows the top 30 call option combinations that can be purchased by selling one 25-delta put, and the top 30 call option combinations that can be purchased by selling one 15-delta put.
McElligott added: “By selling lower delta puts, you can still fund your call purchases in a pretty leveraged fashion.”
In the past few days, one factor possibly supporting the market floor is that investors have been actively monetizing previously purchased put options, i.e., taking profits. McElligott believes this dynamic helped drive Monday’s dramatic reversal—when the S&P 500 index, Nasdaq Composite Index, and Dow Jones Industrial Average all recovered early losses and closed higher.
He said investors exercised or sold large volumes of puts tied to the SPDR S&P 500 ETF Trust.
Of course, there are also signs that fear in the options market is beginning to ease. In Wednesday's afternoon session, the Chicago Board Options Exchange Volatility Index (VIX)—commonly known as Wall Street’s “fear index”—was just below 25 and declined that day. Given the S&P 500’s small dip that day, this is an uncommon occurrence.
Disclaimer: The content of this article solely reflects the author's opinion and does not represent the platform in any capacity. This article is not intended to serve as a reference for making investment decisions.
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