FIX-3-7.5 is a messaging protocol developed by the financial services industry to enable members to connect, interact, and exchange financial information with each other. It is based on the ISO 15022 standard, and provides a fast, reliable and secure environment for financial trading.In Fix & Fasten, version 3.7.5 provides message flow optimization and improved stability compared to earlier versions. It also supports a higher level of encryption, making it more secure than previous versions. Furthermore, FIX-3-7.5 enables faster and more reliable communication between parties, and provides support for additional custom message types. The protocol is especially well suited to the electronic trading of equities, based upon the FIX Protocol Technical Standards.