In March 2023, Silicon Valley Bank (SVB), specializing in banking services for technology startups and financing nearly half of venture-backed technology, went bankrupt. SVB's bankruptcy was followed by the bankruptcies of major banks Silvergate Bank, First Republic Bank, Signature Bank, and Credit Suisse Bank. A series of bank failures and past crisis experiences have increased concerns about the risk of financial contagion across the global economy, and SVB's collapse has drawn attention to the resilience of the global banking system and financial markets. Given that predicting the contagion impact of the crisis is crucial for both investors and the national economy, examining the impact of SVB on sectors listed on the BIST is crucial for Turkey. Therefore, this study aims to examine the impact of SVB's bankruptcy on the banking, insurance, food and beverage, IT, tourism, and services sectoral indices listed on the BIST. An event analysis was conducted for the period January 2, 2023, to August 18, 2023. The findings show that the SVB bankruptcy did not have a homogeneous impact on sector indices. As of the event date, sectors other than the banking sector showed negative cumulative abnormal returns. In the post-event period, significant differences emerged between sectors; cumulative abnormal returns were more negative in the IT and tourism sectors, recovery took longer in the insurance sector, and the banking sector reached positive cumulative abnormal returns the quickest.