I assume a product related directly to another product. So when energy prices start to go up, invest in heat pump companies.
Thats what I was guessing but was thrown off because it is a pretty natural nth order effect. Gas prices go up, more efficient cars get sold.
alt Hacker News
Thats what I was guessing but was thrown off because it is a pretty natural nth order effect. Gas prices go up, more efficient cars get sold.