US-HK ADR Arbitrage Monitoring: Real-Time Cross-Market Spread Calculation with WebSocket Streaming
At 9:30 AM ET on March 14, 2026, Alibaba's ADR (BABA) traded at $92.45 on NYSE while its Hong Kong ordinary shares (9988.HK) sat at HK$745.20. The implied conversion ratio—based on the prevailing USD/