Financial customers, particularly in Data Center Interconnect (DCI) scenarios, face specific challenges that Huawei's solutions like the OptiXtrans DC908 address. According to HCSA-Sales-Transmission & Access documentation, key pain points for financial customers include:

Financial disaster recovery (B): Financial institutions require robust disaster recovery mechanisms to ensure data integrity and business continuity, a critical need in DCI scenarios.

Financial network attacks (C): Cybersecurity is a major concern due to the sensitive nature of financial data, making network security a top priority.

Increased leased line prices (D): Rising costs of leased lines push financial customers toward cost-effective self-built networks, a pain point Huawei addresses with solutions like DC908.

Frequent stock transactions (A): While important, this is a business requirement rather than a technical pain point related to transmission or access infrastructure. It's not listed as a primary concern in the context of DCI or POL solutions for financial customers.

Thus, B, C, and D are the verified pain points.