(Reuters) - Banks raised $23.5 billion by issuing investment-grade bonds on Tuesday, the biggest debt issuance by financial institutions in a single day since the beginning of 2016, as they anticipate potentially higher interest rates next year.

The $23.5 billion in debt issued by financial institutions accounted for 78% of Tuesday's total $30.15 billion in high-grade bond sales, which was the fifth-largest day of overall issuance in 2024, according to a Wednesday report by BMO Capital Markets.

"From yesterday's flood of issuance, it seems like banks are issuing bonds now to get ahead of what could happen next year with rates" under President-elect Donald Trump's administration, said Jack McIntyre, global fixed income portfolio manager at Brandywine Global.

"(We) will have to see what happens with risk, assets, uncertainty and volatility the rest of the year into the new year."

Tuesday's largest note offering came from HSBC ( HSBC ), which sold $6.5 billion in bonds to fund a tender offer for the bank's notes due in 2025 and 2026, according to International Financing Review.

Other banks that issued debt on Tuesday include BNP Paribas SA, Citigroup ( C/PN ), Goldman Sachs ( GS ), Huntington Bancshares ( HBAN ), Societe Generale and Westpac.

Yankee banks, or non-U.S. banks which tapped the domestic market, accounted for $14.5 billion of Tuesday's supply, BMO said. This is the fourth-largest day of Yankee bank supply in at least eight years, BMO added.

Demand for Tuesday's sales was strong at over three times the volume on offer, according to BMO.

A total 13 borrowers sold bonds on Tuesday, which included non-bank deals from automaker Mercedes-Benz and construction equipment maker Caterpillar.