GIC is one of BP's largest shareholders, holding more than a 1% stake in the company's shares.
On Apr 20, when the Deepwater Horizon oil rig exploded and sunk, GIC's stake was worth about US$1.9b. Since then, BP's share price has plummeted and GIC's stake is now worth about US$1b. This is a loss of about US$900b or S$1.3b of market value since the disaster began.
The Disaster was an unexpected by the oil industry, but in hindsight should have been avoided.