A Bitcoin mining ETF that most income-focused investors have probably never encountered just posted a 52% return in a single week. The CoinShares Bitcoin Mining ETF, trading under the ticker WGMI, has been one of the most explosive funds in the entire ETF universe, and it doesn’t even hold any actual Bitcoin.

What WGMI actually is, and why it’s moving

The fund launched on February 7, 2022, originally as the Valkyrie Bitcoin Miners ETF before being rebranded under the CoinShares name in late 2024. Its investment mandate is straightforward: at least 80% of assets must be allocated to companies that generate 50% or more of their revenue or profits from Bitcoin mining operations, related services, or mining hardware and software.

The fund is actively managed, with an expense ratio of 0.75%.

WGMI posted approximately 300% gains in its first full calendar year of existence. In Q2 2025, the fund returned 78%. Year-to-date returns as of mid-2026 sit in the range of 70% to 88%, with one-year returns stretching between 230% and 310%. Assets under management have climbed to roughly $400 million. The fund’s 52-week trading range has spanned from approximately $19 to $77.

Why mining stocks are outperforming Bitcoin itself

Bitcoin mining equities function as a leveraged bet on Bitcoin’s price without using any actual leverage. When Bitcoin rallies, mining companies see their profit margins expand dramatically because their primary revenue source (newly minted Bitcoin and transaction fees) increases in value while many of their costs, particularly capital expenditures on hardware, remain relatively fixed in the near term. Market analysts have characterized WGMI as a high-beta, risk-on investment, frequently outperforming spot Bitcoin during strong market phases, albeit with heightened exposure to operational and regulatory risks endemic to the cryptocurrency market.

Bitcoin’s most recent halving cut block rewards in half, which theoretically squeezes miner margins. But when Bitcoin’s price rises fast enough to more than compensate for the reduced rewards, the surviving miners with efficient operations and low energy costs become increasingly profitable.

What this means for investors

Mining stocks carry operational risks that spot Bitcoin doesn’t, including energy pricing fluctuations, regulatory uncertainty across multiple jurisdictions, and the ever-present risk of hardware obsolescence. The 0.75% expense ratio eats into returns over time compared to passive alternatives.

The Bitcoin mining sector is relatively small compared to broader equity markets. When capital flows into a $400 million fund focused on this niche, it can amplify price moves in the underlying stocks. For investors who already hold spot Bitcoin or Bitcoin ETFs, WGMI represents a fundamentally different risk profile — it’s an amplified equity bet on the infrastructure layer of the Bitcoin network, with additional corporate governance, operational, and regulatory risks that come with owning stocks instead of the asset itself. A 52-week range of $19 to $77 reflects the severity of drawdowns the fund has experienced.