# Copper and Generators and alternators

Generators and alternators needs copper; their prices have moved together.

Source page: https://www.materialinsights.org/links/copper-and-generators-and-alternators/

[Copper](https://www.materialinsights.org/commodities/copper/) (commodity) and [Generators and alternators](https://www.materialinsights.org/energy/e_generators/) (energy): 2 relationships.

## How they are linked

### 1. Material need

*Physical flow · Direct · Copper → Generators and alternators*

Building or running Generators and alternators needs copper.

### 2. Price link: windings

*Cost and price · Weak · Both ways*

Copper windings are a large share of material cost. The link hardly shows: both monthly and yearly correlations are close to zero, since the index moves smoothly while copper swings, and makers use surcharges and hedges rather than changing list prices.

- **-0.01** monthly change correlation
- **-0.07** 12-month change correlation
- **0.41** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.