#美光涨超12% July 21 Semiconductor Insights

Recently, the semiconductor sector’s price swings have been like a roller coaster. But overall, after this month’s drop of over 20%, tech stocks and memory chips are now seeing a strong oversold rebound in the past few days.

1、 U.S. stocks last night: The broad market just watched, while memory chips directly took off
Last night (July 21), the three major U.S. stock indexes traded mostly sideways around the flat line. The market was waiting for today’s (the 22nd) post-market earnings reports from Google Alphabet and Tesla.
The Nasdaq fell 0.05% to close at 25,508.07. The S&P 500 dropped 0.2% to close at 7,443.28.
But semiconductor and memory-related stocks were the absolute stars last night, and dip-buying money was extremely aggressive.
Micron Technology (MU) went completely wild: surged +12.17% (up $105.36), closing at $970.82, with full-day trading volume nearing 50 million shares. Earlier in mid-July, Micron was hammered down by nearly 30% amid concerns that AI spending had peaked. This rebound last night essentially signaled that shorts had taken profits, while longs began aggressively reclaiming lost ground.

2、 South Korean stocks this morning: Volatility even higher than Bitcoin—the game after a new king takes the throne
Today (July 22), South Korea’s KOSPI index swung violently during the trading session. In recent days, due to the semiconductor sector’s surge and crash, the market volatility in South Korea has even exceeded Bitcoin, frequently triggering circuit-breaker mechanisms (sidecars). But this morning, bulls had the upper hand, and the index is working hard to reclaim the 7,000-point level.
Major background that must be known: During this 2026 AI wave, SK Hynix officially surpassed Samsung Electronics, taking the historic No. 1 spot by market value in South Korea! This is mainly because Hynix has absolute dominance in AI high-bandwidth memory (HBM). In addition, on July 10, Hynix raised $26.5 billion in ADR issuance in the U.S. (more than 7 times oversubscribed), making it the talk of the moment. Samsung is under extreme pressure and is reportedly holding a big move, preparing to list in the U.S.
Individual stock moves: After the panic two weeks ago, when Hynix plunged 11.5% in a single day and Samsung crashed 8%, today both giants are seeing a “revenge surge.” Hynix is consolidating around 2.9 million Korean won, and Samsung is also stabilizing and rebounding as it oscillates. Driven by the stimulus of Micron’s explosive rally in U.S. markets, funds are flooding into South Korea’s memory “twin stars” today.

3、 Japanese stocks this morning: Semiconductor equipment giants lead the counterattack
Japan’s Tokyo market (Nikkei 225) was just as strong this morning. A few days ago, the Nikkei even dipped below 70,000 points, but last night’s big jump in U.S. semiconductor stocks gave Japanese shares a strong boost.
Japan’s semiconductor equipment and materials stocks (such as Tokyo Electron, Advantest, etc.) led the charge higher this morning, and the Nikkei index rebounded strongly by more than 3%.
The harder they were hit earlier, the more violently the valuation repair is happening these past couple of days. The willingness of buy-side institutions to “pick up bargains” is very strong.

Summary
For the semiconductor and memory sector, the market has basically completed the process of a stage-level bottoming out. Micron surged 12.17% last night, already blowing the starting horn for the rebound. Now, the biggest profit split and uncertainty for memory stocks come down to whether, in the earnings reports from today’s post-market tech giants like Google, the guidance for AI capital expenditures is still strong. If the big firms continue to sign the checks, this rebound for Hynix, Micron, and Samsung could keep charging higher. #Summer Creative Camp