$100 oil - Chat GPT values HBR at £10–£25 per share30 Sep 2025 15:54
Scenario modelling: $100 oil
Let me outline a rough scenario and then estimate a fair share price under it. The numbers are illustrative.
Assumptions under $100 oil
Suppose Harbour can sell its barrels at $100 (or that the average realized price, net of hedging, is somewhat lower, say $90–95 after hedging and transport)
Production: assume it maintains stable or modestly growing output (say ~ 450,000 boe/day, consistent with post‑Wintershall scale)
Operating costs + royalties: let’s assume their full cost per barrel (opex + royalties + depreciation) is, say, $35–$45/boe (these are guesses)
Taxes / windfall levy: assume a “normal” tax burden plus windfall tax. Suppose combined effective tax and levies take ~50–60 % of incremental profits at $100 oil (in UK / North Sea that high)
CapEx & other expenditures: assume they must invest to maintain/replace decline, so a nontrivial portion of cash flow is used for capex
Discount rate / discount to equity: assume a discount rate (cost of equity or WACC) in the range 8–12 %
We’ll run a simple “incremental cash flow” approach: compute additional cash flows under $100 vs baseline, discount them, and see how much value is added to the current base.
Simplified incremental value estimate (rough)
Incremental revenue per boe
If average cost (all‑in) is $40, then incremental margin per boe = $100 – $40 = $60
After tax margin
If 55 % of that margin is taken in taxes/levies → net margin = $60 × (1 – 0.55) = $27
Volumes
Suppose 450,000 boe/day → annual = 450,000 × 365 = 164,250,000 boe
Incremental net cash flow
164.25 million × $27 = $4,435 million (~$4.435 billion) in incremental free cash flow attributable to $100 oil scenario
Discounting / capitalizing
If you treat that as a perpetuity or over a finite horizon, use a discount rate. For simplicity, assume it’s sustainable and treat it as a perpetual incremental cash flow. At discount rate 10 %, present value = 4,435 ÷ 0.10 = $44,350 million (USD)
Convert to GBP & per share
Assume USD/GBP ~ 1.25 (i.e. $1 = £0.80) → that PV in GBP = £35,480 million
Add that incremental value to current base valuation (say market cap ~£3,600 million) → total ~ £39,080 million
Shares outstanding ~ 1.67 billion shares (per earlier)
Value per share = £39,080 million / 1,670 million = ~ £23.4 per share
Discount / risk adjustment
That is a very “optimistic” base. You might want to discount for risk, growth uncertainty, non‑sustainability, eventual reversion to lower oil, etc. Suppose you apply a discount or knock‑down factor of 50 %, then fair = ~£11.7 per share
So under this illustrative model, with favourable assumptions, fair value might lie in something like £10–£25 per share depending on how aggressively you discount risk, tax, capital needs, and whether $100 oil is sustained.