Why Boss Energy's brutal selloff may be justified
Boss Energy extends brutal selloff to 49% over two days as shock cost guidance and production cuts raise project viability concerns.
Source: Shutterstock
Mentioned
KEY POINTS
- Boss Energy's FY26 guidance shows costs 42% higher than Macquarie expectations, and capex 64% above forecasts, potentially wiping millions from the project's net present value.
- Cash holdings plummeted 42% quarter-on-quarter to just $36.5 million in June, while the company faces uncertainty over how many additional wellfields are needed due to less continuous ore deposits than expected.
- The expert review could determine whether the Honeymoon project remains economically viable, creating a binary outcome for investors despite favourable uranium market conditions.
Boss Energy's (ASX: BOE) share price carnage entered its second day, falling as much as 9.1% to $1.73 in early trade and stretching the two-day rout to 49%.
To recap the catalyst behind yesterday's selloff:
Boss Energy provided a shocking FY26 guidance as it "identified potential challenges that may arise in achieving nameplate capacity ... largely due to the potential for less continuity of mineralisation and leachability."
To address these uncertainties, "an independent review by subject matter experts will commence shortly to determine the extent to which the above affects enhanced feasibility study assumptions."
FY26 C1 cash cost guidance of A$41-45/lb vs. Macquarie's forecast of $34.93/lb (23% higher than expected)
FY26 AISC between A$64-70/lb vs. A$47.29/lb (41.7% higher)
Capex of A$56-62m vs. A$36m (64% higher)
Honeymoon production of 1.6m lbs vs. 1.72m lbs (7% miss)
Feasibility study assumptions
Boss released its Enhanced Feasibility Study (EFS) for the Honeymoon Project in June 2021. This study, which updated the January 2020 feasibility work, included revised capital and operating estimates, updated wellfield designs, and higher economic assumptions, resulting in an NPV of $308.7 million.
Source: Boss Energy (June 2021)
The EFS made several key assumptions that now look optimistic:
Uranium price: The study assumed US$60/lb versus current prices around US$70/lb – a positive for Boss, but clearly not enough to offset cost blowouts.
All-in sustaining costs: The EFS assumed life-of-mine AISC of US$25.62/lb. While FY26 represents just one year of the mine's 11-year life, the guidance midpoint translates to US$43.64/lb – a significant jump.
Capital expenditure: Macquarie had forecast capex would decline steadily from $90m in FY24 to $37m in FY26 and $22m in FY27. The new guidance shatters this trajectory.
At a glance, with FY26 costs sitting 41% above EFS assumptions, notwithstanding other factors, this could easily wipe off $100 million from the project's NPV.
Cash Burn Accelerating
Boss reported $224 million in cash and liquid assets at 30 June 2025, with no debt. The company's liquidity has hovered between $220-250 million since September 2024, but the composition has shifted dramatically.
Cash holdings plummeted 42% quarter-on-quarter, from $63.7 million in March to just $36.5 million in June. The overall liquidity position only held steady due to higher uranium inventory levels.
Source: Boss Energy
The Wellfield Challenge
The other challenge relates to this comment from the FY26 update: "Results from this drilling and initial wellfield design work has shown less continuity of mineralised horizons compared to what was assumed in the 21 January 2020 Feasibility Study."
In other words: the company will likely need more wellfields than originally planned because the ore deposits aren't as continuous as expected. Boss currently has three wellfields online, with Macquarie expecting this to ramp up to nine by March 2026.
The uncertainty around how many additional wellfields are required creates a significant cost unknown. The EFS cash cost assumptions for wellfields will need substantial upward revision.
Source: Boss Energy (2021 EFS)
The bottom line
A near-50% correction might seem extreme for what initially appeared to be minor cost revisions and pending reviews. But the reality is far more serious.
Boss has delivered a massive upward revision to FY26 costs and capex – a complete reversal from its economic study assumptions. This margin compression could eliminate millions in project value.
When you consider the deteriorating economics versus EFS assumptions, the accelerating cash burn, the recent CEO departure, and the uncertain outcome of the expert review, the market's harsh reaction appears justified.
As the market tries to price in these multiple uncertainties, it's also confronting a worst-case scenario: what if the expert review concludes the project is uneconomical at current uranium prices? With costs spiralling well beyond feasibility study assumptions and operational challenges mounting, Boss Energy faces the uncomfortable reality that its flagship project may not deliver the returns originally promised.
