The cumulative effect of interest rates across finance is likely what creates the real tightening and it flows through everything, but yeah that is the point and what leads to disinflation/deflation.
Decreasing prices to 2020 levels needs to be juxtaposed against commodity prices that are still elevated compared to 2020 and likely higher labour costs, without knowing how exactly the former flows through to procurement. But when prices were low in 2020, Lithium futures were at 30-50,000 CNY/T and all commodities were much lower.
- Copper started 2020 at $2.80, dropped almost down to $2.00, now over $4
- Iron spent 2020 in the $80s, has fluctuated a lot since but currently $120
- Aluminum started 2020 at $1800, dropped to $1500, now $2300
- Nickel at $13.5k, dropped to $10.8k, now $22.7k
- Zinc (also might impact stainless steel prices) started 2020 at $2300, up to $2400, dropped to $1800, now at $2700
- Lithium started 2020 at 54k, went as low as 38.6k, currently at 217.5k (peaked at almost 16x but still almost 6x the low)
Labour costs will be a huge part and this is all offset by efficiency of scale since 2020, but I'd be conservative about what it'll mean for near-term cost and margins