Company: WAL-PA
Filing Date: 2025-11-03
Form Type: 10-Q
Source: 0001628280-25-047883
Chunk: 182

Company: WESTERN ALLIANCE BANCORPORATION
Filing Date: 2025-11-03
Form: 10-Q
Item: Part I, Item 3
Chunk 182
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 have been no changes to the Company's exposure limits.

Net Interest Income Simulation. To measure interest rate risk at September 30, 2025, the Company used a simulation model to project changes in net interest income resulting from forecasted changes in interest rates. This analysis calculates the difference between a baseline net interest income forecast using forward yield curves, compared to forecasted net interest income results from an immediate, parallel shift in rates upward or downward, along with other scenarios directed by ALCO. The simulation model includes various assumptions regarding re-pricing relationships for each of the Company's products. Many of the Company's assets are variable rate loans, which are assumed to re-price at the next rate reset period and proportional to the change in market rates, depending on their contracted index, including the impact of caps or floors. The simulation model also incorporates prepayment assumptions for applicable loans and investments with such optionality. The Company's non-term deposits reprice to underlying market rate changes based on product and line of business level model assumptions. Current non-term deposit repricing assumptions result in a product-level beta range of 48% to 92%, depending on product, with an average beta of 60%. 

This analysis illustrates the impact of changes in net interest income for the given set of rate changes and assumptions. It does not account for all factors that could impact the Company's results, including changes by management to mitigate interest rate changes or secondary factors, such as changes to the Company's credit risk profile as interest rates change. The results will also be impacted by seasonality in the balance sheet. Furthermore, loan prepayment rate estimates and spread relationships change regularly. These assumptions are inherently uncertain and as a result, actual results may differ from simulated results due to factors such as timing, magnitude and frequency of interest rate changes as well as changes in market conditions, customer behavior, management strategies, and changes that vary significantly from the modeled assumptions may have a significant effect on the Company's actual net interest income.

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The table below presents the changes in net interest income that would occur in response to an instantaneous and sustained increase or decrease (shock) in market interest rates based on a dynamic balance sheet. In addition, the table provides results from additional scenarios in response to gradual, parallel changes (ramp) in market interest rates over twelve months. The Company continues to evaluate the scenarios that are presented as interest rates change and will update these scenario disclosures as appropriate.

Sensitivity of Net Interest Income

Interest Rate ScenarioDown 200Down 100Up 100Up