What if sodium-ion batteries undercut lithium for grid storage?
Cheap sodium-ion grid storage undercuts lithium; the genuine reads are lithium/spodumene lower and a copper bid as storage buildouts scale, not an NVDA/robotics rally — the mapped robot_productivity/AI leg is a stretch. Closest rhyme is LFP's displacement of nickel-cobalt chemistries, which crushed those metal premia. Transmission: hits lithium miners (Albemarle/SQM) hardest while helping utility-storage integrators. Forward angle: sodium-ion energy density still favors stationary over EV, so lithium's auto demand is less threatened than headlines imply.
how we built this number — every step
The class rate is measured from our dated, sourced event library (decade-normalized Poisson — the full table is public at base_rates.json). The variant’s share within its class is the analyst’s editorial call, published so you can audit it. A wider range means thinner precedent. Full recipe: methodology · scored at Reality Check.
The butterfly cascade
How this trigger trickles across markets, left → right — the root shock, its first‑order moves, then the ripple effects. Drag any node; tap a market for its real price history.
Resolution timeline — how this probability is moving
Our model's odds (gold) over time vs the crowd's (Polymarket, blue), from the past toward the 1–3 years horizon. Each dot is a real macro event that nudged the probability — green pushed it up, red pushed it down. Tap a dot for the source. The gold path is an illustrative reconstruction anchored to today's estimate — real dated events, not a live re-estimate history.
What it would mean
If this plays out, it is a mixed shock. A cheap sodium-ion cell reaches grid-storage mass production, undercutting lithium and reshaping the storage market. The trigger decomposes into signed root‑shocks — Industrial demand ▲ — which propagate through our causal graph to the markets below.
If it happens — the markets it would move
Biggest moves first. Projected moves are cascade-model priors; hist A–B% = what comparable past events actually did (measured abnormal returns), and model prior · unmeasured marks markets with no analogue backing yet. Tap any market for its price history.
| Market | Class | Projected move | |
|---|---|---|---|
| 1 | Freeport (copper) FCX 📈 chart | Equity | ▲ +0.3% hist -3.48–+7.29% · other way +7.64% (n=12) |
| 2 | Copper XCUon Hyperliquid 📈 chart | Commodity | ▲ +0.1% hist -1.96–+4.06% · other way -1.02% (n=12) |
Probable recommendation
Why we may diverge from history
Trust the cascade long on FCX/XCU: the negatives come from copper-specific supply windows (Grasberg, Comex squeeze, copper tariff), wrong-signed for demand — sodium-ion frees copper for grid storage, a demand channel history inverts.
Historical precedent — what analogous events actually did
Across 12 analogous events (overlap‑weighted), as abnormal returns — market beta stripped, so it's the event's own effect, not the market backdrop. Shown at 20 days (persistent) and 5 days (immediate); ↺ fades = the two horizons disagree. Confidence = consistency × sample × significance.
| Asset | History says | Abnormal (20d · 5d) | Hit | n | Confidence | vs cascade |
|---|---|---|---|---|---|---|
| FCX FCX | LONG | +7.0% · 5d +2.9% | 70% | 12 | 0.38 | ✓ matches cascade |
| XCU XCU | LONG | +3.9% · 5d +0.7% | 70% | 12 | 0.38 | ✓ matches cascade |
| US dollar DXY | LONG | +0.2% · 5d -0.3% ↺ fades | 52% | 12 | 0.03 | · |
| Gold XAU | SHORT | -0.3% · 5d -0.7% | 48% | 12 | 0.00 | · |
| Volatility VIX | SHORT | -1.6% · 5d -2.1% | 48% | 12 | 0.00 | · |
| Bitcoin BTC | LONG | +0.7% · 5d -1.5% ↺ fades | 25% | 7 | 0.00 | · |
| High-yield credit HYG | SHORT | -0.1% · 5d +0.2% ↺ fades | 50% | 10 | 0.00 | · |
| 10y yield DGS10 | LONG | +5bp · 5d +3bp | 41% | 12 | 0.00 | · |
Why this probability
Sodium-ion grid storage genuinely advancing in China; mass production undercutting lithium plausible 1-3yr. A base‑rate‑anchored prior, continuously scored against what actually happens — not a forecast.