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1 Markets I: The Ecosystem and Exchange-Traded Marketsالأسواق عبر الإنترنت 2 Markets II: Rates, FX and Creditالأسواق عبر الإنترنت 3 Markets III: Commodities, Energy and Cryptoالأسواق عبر الإنترنت 4 Quantitative Methodsالأساليب عبر الإنترنت 5 Derivatives and Volatilityالمشتقات عبر الإنترنت 6 Rates, Credit, XVA and Riskالفائدة والائتمان والمخاطر عبر الإنترنت 7 Research Craft: Predictors, Backtests, Measurement, Portfoliosالبحث عبر الإنترنت 8 Strategies I: Equities and Futuresالاستراتيجيات عبر الإنترنت 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desksالاستراتيجيات عبر الإنترنت 10 Microstructure and Executionالتنفيذ عبر الإنترنت 11 Market Making and High-Frequency Tradingصناعة السوق عبر الإنترنت 12 Machine Learning for Marketsتعلم الآلة عبر الإنترنت 13 Low-Latency Softwareالتكنولوجيا عبر الإنترنت 14 Networks, Hardware and Trading Infrastructureالتكنولوجيا عبر الإنترنت 15 Research, Data and Risk Platformsالتكنولوجيا عبر الإنترنت 16 The Desk and the Firmالشركة عبر الإنترنت 17 The Industry: Firms, Roles and Careersالمسارات المهنية عبر الإنترنت 18 The Interview Bookالمسارات المهنية عبر الإنترنت
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Quantitative Finance · المسرد

ما معنى Path inflation؟

Definition 19.1 Networks, Hardware and Trading Infrastructure · الفصل 19 — Cross-Region Crypto Networks

The path inflation of a route between two places is its measured round trip divided by the round trip light would need along the geodesic in the route’s medium (for long-haul networks, fibre): chapter 10’s route factor, for round trips over networks whose medium and path are not published.

From Tokyo toGeodesicVacuumFibreBackboneSpecialistPath inflation
(km)RTT (ms)RTT (ms)(ms)(ms)backbonespecialist
Hong Kong2 88319.228.1––––
Singapore5 31135.451.868.065.41.311.26
N. Virginia10 89572.7106.3150.2135.41.411.27
Frankfurt9 35962.491.3224.3136.52.461.50
London9 58664.093.5210.0139.62.251.49
Stockholm8 19454.779.9245.3124.33.071.56
Table 19.1. Tokyo’s hubs: geodesic distances between the region cities and the round trips light needs along them, against the median round trips AWS published for April 2026 over its backbone (VPC peering) and over Direct Connect with a specialised network, and the path inflation of each against the fibre floor. Data: nw_race.hub_rows().
Round trips from Tokyo: the fibre floor along the geodesic, and the published medians over a specialised network and over the provider’s backbone (April 2026). Data: fig_race.py, .
Figure 19.1. Round trips from Tokyo: the fibre floor along the geodesic, and the published medians over a specialised network and over the provider’s backbone (April 2026). Data: fig_race.py, Table 19.1.
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