ERO · Ero Copper Corp. · Stock research

-# ERO — Ero Copper Corp.

Current Thesis

A week ago the complaint about this name was that the equity would not confirm the metal: on 2026-08-14 the shares closed $33.80, under the then-52-week high of $38.03, days after COMEX copper printed its highest-ever intraday level of US$6.77/lb on 2026-08-07. That gap closed in five sessions. The 2026-08-21 close of $39.42 is itself the 52-week high, the shares are up 46.1% over three months, and RSI(14) reads 78.1 against 75.0 a week earlier. No company announcement landed in that week — Q2 results were 2026-08-05 and nothing company-specific is on the tape since.

What re-rated, then, was the multiple on already-published numbers: Tucumã at 8,964 t of copper in Q2 2026 with a C1 cash cost of $2.10/lb, consolidated $284.3M revenue, $144.0M adjusted EBITDA and $0.83 adjusted diluted EPS versus consensus $280.5M and $0.78 (results release, 2026-08-05). The awkward part of the timing: the physical squeeze that carried the metal narrative was unwinding in the same week. Cash-to-three-month backwardation spiked above US$545/t midweek and narrowed to about US$176/t by Thursday; LME on-warrant stockpiles rebounded sharply after a 42-session drawdown; COMEX registered US inventories reached a record ~670,000 t, roughly eightfold since February 2025.

Bullish and bearish views on Ero Copper Corp.

The model's bull view on Ero Copper Corp. (ERO), in brief: The low-cost asset is the one still ramping. The bear view: B of A Securities' 2026-07-16 raise took its target to $34. Both cases follow in full.

Bull Case

• The low-cost asset is the one still ramping. Tucumã Q2 2026: 715,415 t processed (+27% QoQ), 1.44% Cu grade, 88.2% recovery, C1 $2.10/lb versus Caraíba's $2.76/lb (2026-08-05).
• Guidance held after a beat, not after a miss. 2026 copper 67,500–77,500 t, C1 $2.15–$2.35/lb, gold 40,000–50,000 oz, capex $285–330M, all maintained on 2026-08-05.
• Declared upside sits outside the guidance ranges. Tailings filtration capacity was expanded ~8% at end-Q2 and additional modular filters are slated for H2 2026 commissioning; the company stated the associated plant and production benefits are excluded from 2026 guidance.

• Growth pipeline is being drilled, not described. Furnas: over 31,000 m completed year-to-date with a pre-feasibility study guided for 2027.

Bear Case

• B of A Securities' 2026-07-16 raise took its target to $34. Nothing verifiable as of 2026-08-23 puts a US-dollar target above the $39.42 close — target revisions, not target convergence, are now the only route to upside.
• The re-rating came without a company datapoint. The move from the 2026-08-14 close of $33.80 to $39.42 carries no earnings, no guidance change, no resource update behind it.
• The squeeze that framed the metal bid is unwinding on the observable measures. Backwardation at roughly US$176/t by 2026-08-20 versus above US$545/t midweek; LME on-warrant stocks rebuilding; COMEX registered inventories at a record ~670,000 t (ICAA, week ending 2026-08-21).
• Leverage into a heavy capital year. Net debt $452.7M against cash of $101.7M and available liquidity of $181.7M at 2026-06-30, with $285–330M of 2026 capex guided.
• The full-year range still needs a second-half step-up. Q2 consolidated output was 17,315 t against a 67,500–77,500 t full-year range, and consolidated C1 of $2.42/lb sits above the $2.15–$2.35/lb guided band.

Setup & Price Structure

The 2026-08-21 close of $39.42 is a fresh 52-week high, clearing the $38.03 level that stood in mid-August; distance from the high is 0.0%. RSI(14) at 78.1 is the highest reading in this coverage window, and the shares are up 46.1% over three months. Positioning evidence is one-directional and observable: price extended into overbought at a new high, retail-facing copper coverage clustered around the record COMEX prints of 2026-08-05 and 2026-08-07, and price now trades above the aggregated consensus target of $32.33 dated 2026-08-09. Insider activity is not screenable in the usual US way — as a Canadian issuer filing on Form 40-F, transactions appear on SEDI rather than EDGAR.

The narrative is maturing. The narrative went mainstream on the record COMEX prints of 2026-08-05 and 2026-08-07 and it is still working — the equity made a new high in the week ending 2026-08-21. But the flow driver behind it moderated in that same week, with backwardation narrowing from above US$545/t to about US$176/t and LME on-warrant stocks rebuilding after the 42-session drawdown. A leg that keeps advancing while its physical premium decays is trading on earnings power rather than on spot dislocation, and the next hard read on earnings power is roughly ten weeks out.

Catalyst Calendar (next 30 days)

• 2026-09-16 — LME September prompt date (third Wednesday). Tests whether the backwardation compression to ~US$176/t by 2026-08-20 continues or the nearby spread re-widens.
• No company-dated event inside 30 days. Q2 results were released 2026-08-05; the next scheduled company disclosure is the Q3 print, estimated ~2026-11-04 based on the prior-year cadence.
• ~2026-11-04 (est.) — Q3 2026 operating and financial results: first read on the second-half weighting after 17,315 t in Q2, and on whether consolidated C1 converges from $2.42/lb toward the guided $2.15–$2.35/lb.
• H2 2026 (no month given) — commissioning of additional modular tailings filters at Tucumã, upside to rather than a requirement of the 67,500–77,500 t range.

What Would Change Our Mind

The structure that matters is the breakout week itself: the entire advance from the 2026-08-14 close of $33.80 to $39.42 happened with no company news, so it can be handed back the same way. A weekly close below $33.80 erases that week and puts price back inside the mid-August range, beneath the old $38.03 high. Secondary conditions that would independently break the frame: sustained COMEX copper under $6.00/lb against the US$6.49/lb quoted for the week ending 2026-08-21; a Q3 print in early November showing Tucumã tonnes below Q2's 8,964 t or any narrowing of the 67,500–77,500 t range to its low end; or an equity/convertible issuance or covenant amendment against the $452.7M net-debt figure disclosed at or before that print.

Correlation Notes

The share price is a levered proxy on COMEX copper and moves with the listed copper-producer cohort; a US listing prices off a COMEX quote that carried a US$400–450/t premium to LME in the week ending 2026-08-21, so a tariff-arbitrage collapse hits US-listed producers through the price they realise, not only through sentiment. All three operating assets are in Brazil (Caraíba, Tucumã, Xavantina), making BRL/USD a direct input to the cost line reported in dollars. Xavantina adds a gold correlation, with the caveat that reported gold costs are flattered by reprocessed historic concentrate, a finite stock. The name is dual-listed NYSE/TSX and much of the sell-side target flow is published in Canadian dollars, so cross-currency target comparisons are only meaningful after conversion.