New Delhi, Oct. 30 -- Microsoft is planning to raise about $25 billion through its first US investment-grade bond sale in more than nine years, as the technology giant joins its Big Tech peers in turning to debt markets to fund its artificial intelligence (AI) ambitions.

The proposed bond sale had gathered more than $100 billion of orders, or over four times the size of the offering, people close to development informed Reuters.

The move marks a shift in how major technology companies are financing their investments. Traditionally, the Silicon Valley giants have typically relied on their large coffers to fund investments. However, the AI spending spree is prompting them to increasingly borrow money and raise equity.

"Microsoft intends ...