Latency Map. δ denotes the exchange’s order-processing speed. ζ is the time it takes for an HFT to send information from one exchange to another exchange. ϵ is the time it takes for an exchange to send its order updating information or route orders to another exchange. η is the time it takes for an investor to receive any updates from exchanges through the securities information processor (SIP). These latencies are dependent on specific exchanges. NYSE is located in Mahwah, NJ. Nasdaq is located in Carteret, NJ. BATS and IEX are in Equinix NY4/NY5 data center, which is located in Secaucus, NJ. At the cutting edge of technology, δ, ζ, ϵ, and η are around 50, 100, 300, and 1000 microseconds.
This paper by Xin Wang models how exchanges’ order‑processing speeds & inter‑exchange connection latencies drive #trade‑throughs (executions worse than the best available price).
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