Blue-chip firms flood US debt market amid investor caution

America’s biggest companies are issuing debt at a pace that would make a college sophomore with a new credit card blush. US corporate bond issuance has hit $1.681 trillion year-to-date through July 2026, a 26.9% increase compared to the same period last year. The catch: investors on the other side of these trades are starting to look a lot more carefully before they buy. The borrowing binge is being powered by a familiar engine, artificial intelligence. Hyperscalers like Alphabet, Amazon, and Meta are tapping bond markets aggressively to fund massive capital expenditure programs, and they’re bringing friends. Technology, communications, and utilities companies have all joined the party, creating a wave of investment-grade paper that’s testing the market’s appetite. A record-setting quarter The second quarter of 2026 was particularly intense. Investment-grade corporate bond issuance reached $605 billion in Q2, a 42% jump from the year prior. Three major hyperscalers alone contributed roughly $78 billion to that total. To put that in perspective, three companies accounted for about 13% of all investment-grade issuance in a single quarter. Overall credit spreads have remained remarkab...