| Interest rate | REER | Copper price | Oil price |
Interest rate | 1 | −0.18 | −0.55 | −0.58 |
REER | −0.18 | 1 | −0.47 | −0.48 |
Copper price | −0.55 | −0.47 | 1 | 0.84 |
Oil price | −0.58 | −0.48 | 0.84 | 1 |