Warren Buffett is set to indirectly bet on a tiny nation that's the world's fastest-growing economy and an emerging oil superpower

• Warren Buffett is set to indirectly bet on Guyana, a tiny country undergoing a historic oil boom.
• Buffett's Berkshire Hathaway owns about 6% of Chevron, which agreed to buy rival Hess this week.
• One of Hess' most-valuable assets is its 30% interest in an oil reservoir off the coast of Guyana.

Warren Buffett is set to gain indirect exposure to the tiny country of Guyana, the world's fastest-growing economy and an emerging oil superpower, thanks to Chevron's planned acquisition of Hess.