Charles Schwab Corp. started using derivatives to hedge interest rate-related risk during the first quarter.

The derivatives had a notional value of $3.9 billion as of March 31, the Westlake, Texas-based company said in a regulatory filing Monday.

Schwab, which runs both brokerage and bank businesses, has been ensnared in the tumult ravaging US regional banks after the Federal Reserve embarked on its most aggressive interest rate tightening cycle in decades last year.

The firm confronted swelling paper losses on securities it owns and grappled with dwindling deposits as customers moved cash into accounts that earn more interest. Schwab executives have said those withdrawals will abate. The pace of cash withdrawals is already starting to slow, Chief Financial Officer Peter Crawford said in a recent statement.

Shares of Schwab slid 0.31% to $47.47 at 9:38 a.m. in New York. The stock had plunged 43% this year through Monday.

To keep up with withdrawals, Schwab has been relying on higher-cost funding sources, including loans from the Federal Home Loan Bank system. Schwab had about $45.6 billion in outstanding FHLB loans and $6.8 billion in repurchase agreements at the end of March.

Last year, the company began issuing certificates of deposit — longer-term savings vehicles that lock up customer money for a fixed period. Schwab clients held $31 billion of CDs at the end of March, accounting for roughly 9% of Schwab’s total bank deposits. Since then, the firm issued an additional $6.8 billion of CDs through other brokers.

Schwab expects emergency funding measures to taper off, forecasting that its use of more expensive funding will peak this year and decrease in 2024, with only limited amounts remaining in 2025.

This article was provided by Bloomberg News.