SoftBank Group Corp. sold $3.6 billion of junk bonds Wednesday, marking a significant funding move as the Japanese conglomerate's aggressive artificial intelligence investments drive up its borrowing costs. The debt sale comes as SoftBank's AI push has fueled a surge in the firm's funding expenses, according to market sources.

The bond issuance reflects SoftBank's strategy to capitalize on the AI boom while managing increased financial pressure from higher interest rates. The conglomerate's Vision Fund has made substantial bets on AI startups, positioning SoftBank at the forefront of the technology sector's rapid expansion. However, this aggressive investment approach has made debt markets more expensive for the company.

SoftBank's ability to raise billions through junk bonds despite rising costs demonstrates continued investor appetite for the company's AI-focused strategy. The funding will likely support further investments in artificial intelligence companies and related technologies, though the higher borrowing costs may impact future returns on these investments.