Following 'Wooden Sister': Aggressively buying 'low-altitude economy' leaders ACHR and JOBY, while continuously taking profits in semiconductor giants and commercial space

On Monday (May 18) Eastern Time, the three major U.S. stock indexes diverged, with the S&P 500 Index and Nasdaq falling for two consecutive days. Memory-related stocks and the semiconductor sector weakened overall. Meanwhile, global bond yields rose broadly, pressuring tech stock valuations; the situation in the Middle East's geopolitical landscape remains uncertain.

Under these market conditions, 'Wooden Sister' displayed a strong 'sector rotation' in her trading operations on May 18: On the buying side, she heavily bet on ACHR and JOBY, leaders in the 'low-altitude economy' at the cusp of commercialization, while aggressively deploying into drone defense. On the selling side, she continued profit-taking strategies, further reducing positions in semiconductor hardware stocks like Taiwan Semiconductor and AMD, and strategically cutting high-cost sectors such as commercial spaceflight and streaming media.

Buying Focus: Heavily swept up 'low-altitude economy' leaders ACHR and JOBY, aggressively deploying into drone defense.

1. The 'Low-Altitude Economy' Duo: Archer Aviation (ACHR) and Joby Aviation (JOBY)

Massive buy-in $Archer Aviation (ACHR.US)$ up to 281,200 shares and $Joby Aviation (JOBY.US)$ 118,700 shares. These two companies are the absolute leaders in the global eVTOL (electric vertical takeoff and landing aircraft/flying cars) field. Entering 2026, the eVTOL sector is experiencing a critical transition from research and testing to commercial implementation. Recent progress in airworthiness certifications has been frequently reported, and the early commercial operations and infrastructure deployments of these two leading companies in specific cities continue to materialize. This substantial move by 'ARK' aims to capture the first-mover advantage in the future trillion-dollar urban air mobility market.

2. Defense, Military, and Unmanned Technology: Kratos (KTOS), AeroVironment (AVAV), L3Harris (LHX)

Increased positions in drone and defense concept stocks $Kratos Defense & Security Solutions (KTOS.US)$45,200 shares, $AeroVironment (AVAV.US)$11,000 shares, and $L3Harris Technologies (LHX.US)$10,500 shares. Against the backdrop of increasing geopolitical tensions globally, modern defense budgets are rapidly shifting toward 'asymmetric warfare' and unmanned equipment. ARK’s precise positioning in these few companies with absolute advantages in tactical drones and military communications reflects a long-term bet on the trend toward technological advancement in defense.

3. AI Infrastructure and Tech Giants: NVIDIA (NVDA), Tesla (TSLA), Amazon (AMZN), Synopsys (SNPS)

Cathie Wood also slightly increased her holdings in $NVIDIA (NVDA.US)$(5,409 shares) and $Tesla (TSLA.US)$(2,682 shares) of core tech giants, while modestly establishing a position in $Synopsys (SNPS.US)$(940 shares). Although the absolute number of shares purchased is not large, this is typical of Cathie Wood’s "buying the dip" or "maintaining base weights" strategy. It shows that ARK remains firmly optimistic about the long-term potential of AI computing power infrastructure and autonomous driving, while embracing fringe innovations.

4. New Energy and Crypto Finance: X-Energy (XE), Bullish (BLSH)

Bought 21,600 shares of advanced nuclear reactor developer $X-Energy (XE.US)$and 52,300 shares of cryptocurrency exchange $Bullish (BLSH.US)$. This perfectly aligns with ARK's long-term strategy in the two disruptive innovation areas of 'clean energy (addressing the energy bottleneck at the end of AI computing)' and 'decentralized finance'.

Additionally, they also purchased 2,130 shares of a high-tech manufacturing and software industry giant $Honeywell (HON.US)$, as well as the largest online food delivery and logistics platform in the United States. $DoorDash (DASH.US)$2,843 shares.

Sell-side direction: Semiconductor giants accelerate profit-taking at highs, reducing positions in commercial space and streaming media former favorites

1. Semiconductor hardware and foundry services: Taiwan Semiconductor (TSM), AMD, Teradyne (TER)

Continuously selling the global leader in chip foundry services $Taiwan Semiconductor (TSM.US)$29,900 shares, reducing position in AI chip giant $Advanced Micro Devices (AMD.US)$38,500 shares, as well as semiconductor testing equipment provider $Teradyne (TER.US)$43,400 shares.This continues ARK's recent core portfolio adjustment logic: as the semiconductor sector's valuation hits new highs repeatedly, market expectations for traditional GPU architectures and foundry models have become highly crowded. ARK has chosen to continuously sell these three key companies in the semiconductor supply chain, adhering to the standard practice of 'taking profits while prices are high' to secure substantial gains from the previous AI hardware boom, optimizing the capital efficiency of the portfolio.

2. Commercial Space: Rocket Lab (RKLB)

Significantly reduced position in the leading commercial space company $Rocket Lab (RKLB.US)$Up to 145,000 shares.Despite the promising prospects of commercial aerospace, space launches are a capital-intensive and cash-burning industry with significant capital expenditure pressures. ARK has withdrawn funds from the high-cost RKLB and shifted investments to the eVTOL sector with clearer monetization paths, representing a tactical reallocation.

3. Streaming Media and Traditional Healthcare: Roku (ROKU), CareDx (CDNA)

Continuing to liquidate old favorites in streaming media. $Roku Inc (ROKU.US)$45,300 shares and medical diagnostics stocks. $CareDx (CDNA.US)$10,900 shares.Facing fierce market competition and weak growth, ARK is accelerating the cleansing of traditional holdings with weakening fundamentals to make room for highly explosive emerging sectors with sufficient liquidity.

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