DRAM ETF holdings change: 000660.KS cuts 2.66 ptsDRAM 美股 ETF 持仓变化：000660.KS下调2.66个百分点
Signal
On June 5, 2026, the Roundhill Memory ETF (ticker: DRAM) executed a holdings change event. The fund holds $16.86 billion in assets under management, has a $3.13 billion daily turnover, and saw trading volume hit 6.68 times its average daily level that session. The ETF began initial trading on April 2, 2026, and follows an explicitly active strategy focused on the memory and high-bandwidth memory (HBM) supply chain.
Portfolio Read
The ETF currently holds 14 total assets, with a top-5 holdings concentration of 58.27% and top-10 concentration of 84.93%. Disclosed rebalance adjustments include a 2.66 percentage point weight cut for SK hynix (000660.KS), dropping its weighting to 14.46% from 17.12%. Three Micron Technology-related total return swap positions saw weight increases: the 595112103 TRS 052427 GS rose 1.07 points to 8.49%, while the 6450267 TRS 052427 GS and 6771720 TRS 052427 GS swap positions added 1.88 and 1.57 percentage points respectively. Current disclosed holdings include 14.95% allocated to cash and other instruments with a reported market value of -$3.57 billion, with SK hynix and Samsung Electronics (005930.KS) as the top two holdings at 14.46% and 10.74% respectively. The fund’s official mandate has not listed explicit underlying assets, with theme alignment inferred from its product name and stated investment focus.
Active vs Passive Classification
The ETF is explicitly categorized as an active strategy, with its active management status confirmed by official issuer documentation rather than inferred from naming or mandate language.
Why It Matters
This holdings change comes just 62 days after the ETF’s initial listing, and its highly concentrated portfolio means shifts in single-asset weights will have outsized impacts on fund net asset value. The fund saw a 5.75% one-day price drop on the event date, paired with well-above-average volume, signaling sharp market reaction to the rebalance. The ETF overlaps with the popular HBM and memory stock theme, with exposure to Micron Technology (MU) at approximately 3.08%, providing a structured vehicle for investors targeting this sector.
What to Watch Next
Investors should monitor for full official holdings disclosures to confirm the fund’s portfolio aligns fully with its memory and HBM supply chain mandate. Additional metrics to track include future rebalance frequency, assets under management growth, and sustained trading volume trends to gauge investor adoption. This signal does not confirm the holdings change will create long-term price movement for underlying securities, nor does it verify the fund’s full portfolio has been fully deployed per its stated strategy.
信号
2026年6月5日，Roundhill Memory ETF（交易代码：DRAM）发生持仓变更事件，该ETF当前管理规模达168.60亿美元，当日成交额31.30亿美元，当日成交量为平均水平的6.68倍，于2026年4月2日首次上市交易。本次变更属于发行方官方定义的主动明确型策略调整，产品主题聚焦内存及高带宽内存（HBM）供应链。
持仓解读
该ETF当前共持有14项资产，前五大持仓集中度达58.27%，前十大持仓集中度达84.93%。已披露的持仓调整包括：SK海力士（000660.KS）持仓权重从17.12%降至14.46%，美光科技相关互换合约（595112103 TRS 052427 GS）权重从7.42%升至8.49%，另有两笔互换合约（6450267 TRS 052427 GS和6771720 TRS 052427 GS）持仓权重分别提升1.88和1.57个百分点。当前披露的持仓中，现金及其他类占比14.95%，对应市值为-35.70亿美元，SK海力士、三星电子（005930.KS）分别为第一、第二大持仓，权重各为14.46%、10.74%。该产品未官方列出明确底层资产，主题关联内存制造商、HBM受益方及半导体设备赛道。
主动/被动属性解读
该ETF被归类为主动明确型策略，其主动管理属性由发行方官方定义，而非基于产品名称或主题的推断。
重要性
本次持仓变更发生在该ETF上市仅62天后，高集中度的持仓结构意味着单一标的权重变化会对产品净值产生显著影响。当日单日价格下跌5.75%，叠加成交量远超日均水平，反映市场对该产品的调整存在显著反应。该产品覆盖的内存赛道与热门HBM/存储主题高度重叠，其中美光科技（MU）相关持仓占比约3.08%，为投资者提供了直接对标该赛道的工具选择。
后续关注
投资者需等待该ETF披露完整的官方持仓明细，以验证当前披露的持仓是否完全匹配其内存及HBM供应链的投资主题。此外，后续的持仓调整频率、资产管理规模变化及成交量趋势也可作为该产品流动性和投资者参与意愿的参考指标。本次信号未证明该持仓变更会对相关个股的长期价格产生持续性影响，也未确认该产品的全部持仓已完全按策略落地。
This analysis was generated by InvestLog AI based on SEC filings, Form 4 insider transactions, Form 144 planned-sale notices, 13F institutional holdings, analyst ratings, and market data. It is for informational purposes only and does not constitute investment advice.这篇研究由 InvestLog AI 基于 SEC 披露、Form 4 内部人交易、Form 144 计划减持、13F 机构持仓、分析师评级和市场数据生成。内容仅供参考，不构成投资建议。