For many financial institutions, high frequency trading volume is growing at an accelerating pace and demanding new requirements on their IT infrastructure. Drivers in their business such as pricing of equities moving from decimal to penny resolution and the growing need for markets to provide improved liquidity are resulting in huge opportunities for financial gain. Taking advantage of these opportunities is, in part, dependent on the care taken in the network’s time synchronization and the management of latency. Wall Street firms who were involved in the early phases of High Frequency Trading have been early adopters of high performance timing solutions utilizing a variety of signals including GPS, IRIG, 1PPS, NTP and now the Precision Time Protocol (PTP) which allows for precision time transfer on Ethernet networks. The implementation of specific timing solutions depends on the trading infrastructure and the network topology. Through a combination of hardware, software, and careful network management, it is reasonable to expect microsecond level time-transfer from traceable time sources to Linux applications.