[SSE Trading Market Data Access Mode Adjustment Notice]

English summary

Hello! According to the notice from Shanghai Stock Exchange, our company will cooperate in implementing the optimization and adjustment of trading market data access mode. The relevant matters are informed as follows: After this adjustment, the trading market data access method in the SSE computer room will be uniformly changed to WAN line, and the original LAN trading line will be officially closed on the evening of July 31, 2026. Core conclusion: The core speed advantage of high-frequency quantitative trading will be significantly weakened; there is almost no substantial impact on medium-low frequency quantitative and fundamental quantitative. This July 31 closure of SSE computer room LAN market data dedicated line and full switch to WAN is part of the exchange's 'trading link equal rights' regulatory implementation, directly erasing the exclusive low-latency market data privileges of institutions. 1. Underlying principle: latency gap between LAN and WAN. Original LAN line: broker computer room and SSE host in the same campus intranet, market data one-way latency only 0.3~0.8 microseconds, no external network routing, no random congestion fluctuation, it is the core hardware moat for high-frequency quant grabbing order book, instantaneous arbitrage, call auction order placement. ...