Saudi Arabia's Arab National Bank has received regulatory approval to raise 2 billion riyals ($533.28 million)through sukuk which will enhance its supplementary capital. The kingdom's seventh-largest lender by assets will privately place the Tier 2 sukuk with a tenor of 10 years although it allows the issuer to redeem the security after five years. Arab National Bank joins a string of Saudi Arabian banks that have sought to replenish their capital reserves in the last couple of years by issuing capital-boosting bonds and bonus shares following a period of strong lending growth. Capital reserves are high in Saudi Arabia due to the kingdom's conservative regulatory standards.