Daily Options Seller Strategy | Micron Technology's Earnings Ignite Korean Index! EWY Up Over 5% in Pre-Market – How to Position for the Memory Chip Rally?

I. Market Barometer

Fueled by $Micron Technology (MU.US)$ strongly positive earnings results, South Korea’s stock market rebounded today, $Korea Composite Index (.KOSPI.KR)$ with the index rising more than 5%. The ETF tracking South Korean equities, $iShares MSCI South Korea ETF (EWY.US)$ soared over 5% in pre-market trading, recapturing part of the ground lost earlier this week following a historic plunge. This high-volatility environment presents a critical window for options sellers to position strategically.

II. Focus on Hot Targets

EWY: Micron Earnings Trigger an AI Memory Explosion; SK Hynix’s U.S. Listing Reshapes Valuation Logic

$iShares MSCI South Korea ETF (EWY.US)$ jumped nearly 7% in pre-market U.S. trading today, after already gaining over 2% yesterday. South Korea’s KOSPI index opened sharply higher and rose more than 5.5% today, triggering a circuit breaker, and briefly surpassing the 9,000 mark intraday. Among its components, SK Hynix surged over 10% at one point, while Samsung Electronics climbed more than 6%.

From a technical perspective, EWY—after suffering a historic plunge earlier this week (down 12% on Tuesday)—rebounded over 2% yesterday and continued its recovery in today’s pre-market session. It is currently finding support near its 30-day moving average, maintaining its medium- to long-term uptrend. $Korea Composite Index (.KOSPI.KR)$ It has posted a 112% gain over the past 12 months, making it the best-performing index globally. $iShares MSCI South Korea ETF (EWY.US)$ It has gained 100% over the same period, with assets under management expanding to approximately USD 23 billion and ample liquidity.

The key catalyst driving today’s rally was Micron Technology’s earnings report, which significantly exceeded expectations across the board.Revenue, profit, gross margin, and next-quarter guidance all exceeded Wall Street expectations, driving Micron Technology’s after-hours share price up by 15%. Micron executives explicitly emphasized that AI-driven structural demand will continue to exacerbate the supply-demand imbalance in memory markets, with industry-wide tightness persisting at least beyond 2027. Micron also announced it has secured 16 cross-sector long-term strategic customer agreements (SCAs), locking in a floor for medium- to long-term revenue and profitability—marking a pivotal shift in the memory industry from a highly cyclical commodity play to a core AI asset class with long-term earnings visibility.

Meanwhile, SK Hynix officially announced it will issue American Depositary Receipts (ADRs) on the Nasdaq,with an expected fundraising amount of approximately KRW 45.45 trillion, trading to commence on July 10 and formal listing scheduled for July 29. This move will enable access to passive funds, ETFs, and long-term institutional capital that invest exclusively in U.S. equities. According to Korea’s Herald Economy, SK Hynix currently trades at an estimated P/E ratio of only 3–4x, while $Micron Technology (MU.US)$ Micron Technology trades at around 8x, and $SanDisk (SNDK.US)$ is as high as 19x; the ADR listing could trigger significant valuation rerating.

On the flip side of heightened market enthusiasm, South Korean regulators urgently hit the brakes—the Korea Exchange announced a delay in launching weekly options on individual stocks, originally scheduled for June 29, covering major constituents such as Samsung Electronics and SK Hynix. The rationale cited was extreme recent market volatility, with circuit breakers triggered a record number of times and the volatility index VKOSPI spiking to a historic high of 95.

III. Seller Options Strategy

1. Cash Secured Put

Sell 1 contract of EWY 20260717 150P; estimated required margin (for reference only): $15,000 ($150 × 100)

Opportunity Rationale:

For investors who acknowledge the global competitiveness of Korean memory chips but have not yet established positions, the current $iShares MSCI South Korea ETF (EWY.US)$ index has rapidly rebounded to elevated levels following Micron’s earnings catalyst and SK Hynix’s ADR announcement, making short-term chasing vulnerable to regulatory cooling measures and profit-taking pressure. However, the fundamentals of the memory sector are undergoing a qualitative shift—Micron’s results confirm that AI-driven structural tightness in memory markets will persist at least through 2027, and SK Hynix’s ADR listing will drive a valuation reassessment toward parity with its U.S. peers.

Investors can sell put options: if the index consolidates in its current high range, they can collect premium income amplified by elevated volatility; if the index corrects due to deleveraging or regulatory disruptions, they may establish positions at more prudent cost levels.

2. Covered Call

Hold 100 shares of EWY common stock and sell one EWY Jun 26, 2026 $210 call option

Opportunity Rationale:

For investors who already hold $iShares MSCI South Korea ETF (EWY.US)$ Investors with substantial unrealized gains have just weathered this week’s extreme roller-coaster market—plunging sharply before surging back—as the index now approaches a new all-time high in the short term. Regulators’ decision to delay the launch of new options contracts also signals caution about excessive market exuberance.

Investors who remain bullish on the long-term thesis of valuation repricing driven by SK Hynix’s ADR listing and the memory supercycle—but are concerned about potential volatility following the current surge in market sentiment—can consider selling call options.

If the index consolidates near current highs, the premium received from selling calls can lower the effective cost basis of the position. If the index continues rising toward the strike price due to memory-sector tailwinds and the option is exercised, it effectively locks in profits near historical highs.

IV. Risk Control Reminder

Although the seller strategy has a high probability of success, investors must still manage risks effectively:

– Position management is key:The biggest risk for option sellers lies in black swan events. It is recommended that margin exposure for a single underlying should not exceed 20% of total capital. Never sell options beyond your capacity for the sake of greedy premiums.

– Timely rolling of covered call options: When a covered call option becomes deeply in-the-money (stock price far exceeds the strike price), and if the underlying stock is still viewed favorably, decisively 'roll' the position — that is, close the current option by buying it back and simultaneously sell an option with a later expiration date and a higher strike price to avoid having the stock called away at a low price.

– Cash-secured put options warn of 'left-tail risk':For cash-secured puts, if the stock price collapses due to deteriorating fundamentals (rather than a normal pullback), do not hold on stubbornly. At this time, stop losses should be executed, or 'rolling down' can be employed to buy time and wait for volatility to normalize.

Make good use of the options seller zone to understand the income strategies for selling optionsEarn option premiums!

Options Risk Warning

An option is a contract that grants the holder the right—but not the obligation—to buy or sell an underlying asset at a predetermined price on or before a specified date. Option prices are influenced by multiple factors, including the current price of the underlying asset, the strike price, time to expiration, and implied volatility. Implied volatility reflects the market’s expectation of future price fluctuations over the life of the option and is derived by reverse-engineering the Black-Scholes pricing model. It is commonly used as a gauge of market sentiment. When investors anticipate greater volatility, they may be willing to pay higher premiums for options to hedge risk, leading to elevated implied volatility. Traders and investors use implied volatility to assess the relative attractiveness of option prices, identify potential mispricings, and manage risk exposure.

Disclaimer

This content does not constitute any offer, solicitation, recommendation, opinion, or guarantee for any securities, financial products, or tools. The risk of loss in trading options can be substantial. In some cases, losses incurred may exceed the initial margin deposited. Even if you set contingency orders, such as 'stop-loss' or 'limit' orders, these may not necessarily prevent losses. Market conditions may make such orders unexecutable. You may be required to deposit additional margin within a short period. If you fail to provide the required amount within the specified time, your open positions may be liquidated. However, you will still be responsible for any shortfall in your account resulting from such liquidation. Therefore, before trading, you should study and understand options and carefully consider whether such trading suits you based on your financial situation and investment objectives. If you trade options, you should be familiar with the procedures for exercising options and the rights and obligations upon expiration. Options trading involves extremely high risks and is not suitable for all investors. Investors should read Characteristics and Risks of Standardized Options carefully before engaging in any options trading strategy.

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