Damage Math

Damage Math

The market marked Alcoa down 46% — from an $83.79 war spike on 2 June 2026 to $45.26 on 31 July, about $10.1B of equity value. But the quarter it fell into was the highest-revenue quarter in the company's history, and near-term consensus earnings did not fall with the price: FY2027 EPS sits 21% below its 30-day peak yet 13% above its level of 180 days ago. The durable value damage is far smaller than the headline drawdown; roughly half the fall is the give-back of a two-week aluminum-price spike. The one genuinely impaired line is Alumina, and the trial rates it 66% likely to be temporary.

The near-term hit — what actually fell

The clean way to size the numerator is the consensus revision record around the trigger. Two things are true at once, and both matter.

Source: consensus estimate momentum, CapIQ vintages 3 Feb 2026 → 2 Aug 2026 (data/sp/estimates.json, momentum series).

Consensus FY2027 EPS ran from $5.23 (180 days ago) up to a $7.52 peak 30 days ago, then back to $5.93 — a 21% cut from the peak, but a $0.70 (13%) gain versus 180 days ago. FY2028 traces the same arc: $5.41 → $8.35 → $7.04, up 30% over 180 days despite the recent cut. The spike and the cut are the same event seen twice: analysts marked a war-driven aluminum deck up in late May and back down after the ceasefire. Revenue tells the same story — FY2027 consensus is $15.2B now versus $13.9B 180 days ago, up 9%.

Against a pre-spike window, the durable markdown is modest. FY2027 EPS fell from $6.70 (90 days ago, before the spike) to $5.93 — a $0.77, 11.5% reduction, or about $201M/yr of net income on 261M shares. That, not the 21% peak-to-trough figure, is the honest near-term hit.

The reported quarter confirms the scale. Q2 FY2026 normalized EPS came in at $2.12 against $2.19 consensus — a 3.2% miss — with revenue of $3.97B versus $4.16B (4.6% light). Management attributed the entire variance to timing: revenue rose 24% to "the highest quarterly revenue in Alcoa Corporation's almost 10-year history," adjusted EBITDA was $901M, and the shortfall "was driven by lower-than-expected aluminum price realization late in the quarter" under a 15-day pricing lag that "does not change the underlying strength of the business" [1].

The company's own guidance change was small and dated, not a reset of earning power. For Q3, the Alumina segment is guided "net favorable by approximately $10 million" on Pinjarra recovery and lower energy, but Alcoa "do[es] not expect to fully recover the production and shipment volumes that were lost" and raised its full-year corporate-expense outlook to "approximately $180 million" [2]. A ~$10M segment swing and a modest cost-guide raise are one- to two-quarter items, not a permanent level shift.

The price and EV move — over the same window

Source: daily closes (data/prices/daily.json); shares 261M and market cap $11.81B (fit_features.market_cap); consensus momentum (data/sp/estimates.json).

The market-cap arithmetic depends entirely on the anchor. From the $83.79 spike, equity fell from $21.9B to $11.8B — down $10.1B (46%). But the stock traded $62–65 through January–mid-May 2026, before the Middle East conflict lifted the aluminum deck; at that ~$64 base, market cap was $16.7B, so the durable fall is $4.9B (29%).

Source: daily closes, selected dates (data/prices/daily.json).

Enterprise value moves in step: net debt was about $0.84B at FY2025 (fit_features.balance_sheet_class), small against the equity, so EV of roughly $12.7B now compares to ~$22.7B at the spike. The pending South32/AliGroup acquisition — $3.1B cash plus ~17M shares, about 6% dilution, closing in H1 2027 [3] — will lift pro-forma EV but also add roughly half again as much alumina and a third more aluminum capacity, so it is flagged here rather than folded into the damage figure.

The NPV arithmetic — two scenarios, workings visible

The question is whether the price fall is warranted by the change in the value of all future cash flows. The transparent test: discount the durable annual earnings shortfall at a 10% cost of equity (a defensible rate for a price-taking, cyclical materials producer), under a temporary reading (the hit reverses after two years) and a permanent reading (a level shift held in perpetuity, no growth). Two shortfall anchors are shown — the peak-referenced cut ($1.59/sh × 261M ≈ $415M/yr) and the pre-spike durable cut ($0.77/sh × 261M ≈ $201M/yr).

Source: derived. Temporary = S × (1/1.10 + 1/1.10²); permanent = S / 0.10; S from consensus EPS revision (data/sp/estimates.json). Adding 2% growth to the permanent stream raises those figures by roughly a quarter.

Set the plausible value damage against the price damage:

Source: derived from price damage (fit_features.market_cap; data/prices/daily.json) and the NPV scenarios above.

The gap runs the same direction in every cell — the price fell more than a conservative reading of the durable hit destroys — but its size swings from $2.9B to $9.3B on the anchor choice, and the largest single contributor to the wide-gap cells is the war spike, not a fresh markdown of the business. On the most defensible pairing — the pre-spike base against a permanent reading of the durable hit — price damage of $4.9B exceeds value damage of about $2.0B, a gap near $2.9B (roughly 59% of the base-anchored drawdown). That is a real but moderate dislocation, not the two-thirds-cut-with-NPV-intact pattern of the framework's Centene precedent. The consensus check points the same way: forward FCF of $1.57B (FY2027) and $1.90B (FY2028) implies 13.3% and 16.1% yields on today's $11.8B cap, clearing the framework's 10% reference bar — the sell side is not underwriting a broken business, which the Yield tab develops against reported FCF that averaged only ~$208M a year across FY2021–FY2025.

The trial — temporary or permanent, presented fairly

The two readings were argued by opposing corpus-cited briefs and scored by three blind judges. Both cases carry real evidence.

The three judges put the probability that the impairment is temporary at 0.66 — the ruling this report carries. The per-judge estimates ranged 0.57 to 0.68 (mean 0.64), and the ruling was recorded as not contested, with order-stability gap of 0.035. The verdict is a lean toward temporary with a meaningful permanent tail — consistent with the arithmetic above, where price damage exceeds value damage but not by the clean multiple the framework's best setups show.

Which line broke — and whether it self-corrects

Consensus locates the break precisely. The Aluminum segment's realized price stayed elevated through the shock ($3,341/t FY2025 → $4,479/t FY2026), while the Alumina segment realized price reset from $418/t to $338/t and segment adjusted EBITDA swung from +$0.92B to −$0.31B.

Source: Visible Alpha consensus driver estimates (data/sp/va.json); Alumina segment EBITDA rounded to $M.

The mechanism cuts both ways, which is why the trial does not read 90/10. In favor of self-correction: alumina is Alcoa's own smelter input, so a lower alumina price lifts the Aluminum segment's margin; caustic and energy costs are normalizing; and Pinjarra has returned to stable operations [13]. Against it: consensus itself expects the Alumina segment to claw back only to about breakeven in FY2027 and roughly $245M by FY2028 — well short of the FY2025 $922M — because the China/Indonesia surplus is structural and the bauxite-grade remedy is gated to 2029 [14]. The aluminum half is a cyclical price recovery; the alumina half is a partial, slow, cost-side one. The Dislocation tab weighs whether this qualifies as peak-fear capitulation given the shape of the drawdown, and Durability tests the year-10 case on a price-taking commodity producer.