Which act was established to protect consumers' personal financial information?

The Gramm-Leach-Bliley Act of 1999 is the correct choice because it specifically addresses the protection of consumers' personal financial information. This act introduced significant regulations regarding how financial institutions must manage and safeguard such private data. It requires institutions to provide clear privacy notices to customers, detailing what information is collected, how it may be used, and under what circumstances it may be shared with third parties.

The act's focus on consumer privacy is a key element, as it emphasizes the necessity for financial organizations to implement privacy policies and safeguards designed to protect sensitive information. This requirement helps ensure that consumers maintain control over their personal financial data, which is essential for building trust in the financial services industry.

In comparison, while the Consumer Financial Protection Act and the Dodd-Frank Wall Street Reform Act also deal with consumer protections and financial regulations, they are broader in scope and do not specifically target personal financial information privacy in the same way. The Financial Services Modernization Act is an alternative name for the Gramm-Leach-Bliley Act, thus directly correlating to the same legislative framework focused on ensuring consumer data security.