Backed by its scarce AAA credit rating and standout earnings, Microsoft (ASX: MSFT) successfully completed a $25 billion bond issuance, ranking among the most heavily sought-after deals in the history of the U.S. corporate bond market. Behind this spectacular showing, however, the bond market's selective differentiation toward AI hyperscalers has become increasingly evident.
The offering attracted peak orders exceeding $115 billion, reaching a subscription ratio of 4.6 times. The underwriting team, led by Wells Fargo, JPMorgan and UBS, narrowed the spread on the longest-dated bonds by as much as 30 basis points from initial price guidance.
Microsoft Chief Financial Officer Amy Hood said on this week's earnings call that the company will raise further capital "when we think the timing is right."
Market participants cautioned, however, that Microsoft's success does not mean other tech giants will receive an equally enthusiastic reception. Recent concerns over AI spending and profitability have pressured higher-risk technology debt—credit default swap costs for Broadcom and SpaceX briefly touched record highs.
Jack Janasiewicz, multi-asset portfolio manager and chief strategist at Natixis Investment Managers Solutions, said, "The credit market is doing a lot of the work of sorting winners from losers. The market remains open to issuance, but not open to everyone."
On Thursday, Microsoft shares closed down 0.16%.
The AAA Rating Advantage: Microsoft's Scarce Status
This issuance came nearly eight years after Microsoft last tapped the U.S. investment-grade bond market—it raised $17 billion in 2017.
The deal comprised 10 tranches with maturities ranging from 2 to 40 years, with the 40-year bond priced at a spread of about 105 basis points over benchmark Treasuries, noticeably below the roughly 133 basis points on Alphabet's comparable maturity, which carries a lower rating than Microsoft.
On the ratings front, Microsoft is the only U.S.-listed company besides Johnson & Johnson to hold top AAA ratings from both Moody's and S&P, a status that gives it a natural edge in standing out amid a crowded supply of technology debt.
Brett Kozlowski, portfolio manager at GW&K Investment Management, said, "The timing of this deal feels quite opportunistic," with strong demand expected, driven mainly by the market's thirst for "extremely rare long-duration AAA bonds," combined with the appeal of yields above 6%.
Microsoft's quarterly results released Wednesday also provided strong support for the issuance—cloud revenue grew 48% year over year, while capital expenditure remained within a manageable range, easing investor worries about hefty AI spending.
CreditSights analysts noted in a Thursday report that the $25 billion bond sale will lift Microsoft's total lease-adjusted leverage only slightly, to 0.7 times, leaving its balance sheet still healthy.
Bond Market Absorption Nears Its Limit as Microsoft's 30-Year Spread Tops Lower-Rated P&G
Despite Microsoft's smooth sailing, bond supply across the hyperscaler industry has approached the upper limit of what investors can absorb.
According to Bloomberg-compiled data, as of Thursday, hyperscalers and data center developers had raised more than $313 billion this year through global investment-grade bond issuance, nearly triple the full-year 2025 total, pushing overall global bond issuance to a record $6.63 trillion.
Facing market saturation, some large borrowers have begun to deliberately cool down. Oracle disclosed this week that it has committed to a net debt increase cap of $10 billion through fiscal 2030 to ease investor concerns about its debt expansion, while Meta turned to the equity market and completed a $25 billion stock offering.
Microsoft's own pricing also reflects the market's cautious sentiment. Despite its AAA rating, its 30-year bond spread reached 95 basis points over benchmark Treasuries—higher than the 30-year bond issued the same week by lower-rated Procter & Gamble (ASX: PG), which priced at a 60 basis point spread, the lowest premium since 2003.
Ayako Yoshioka, director and senior investment strategist at Wealth Enhancement, said, "For 5-year and 7-year Microsoft bonds, I would subscribe without hesitation. But once you stretch out to 30 years, uncertainty at the business model level still needs to be reflected in the pricing."
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