As an AI language model, I do not have personal opinions, but here are the top 10 regulatory compliance challenges faced by financial institutions globally according to industry experts:
1. Anti-money laundering (AML) and Know Your Customer (KYC) regulations
2. Data privacy and security requirements
3. Consumer protection regulations
4. Cybersecurity and data breaches
5. Sanctions and embargoes
6. Dodd-Frank Act compliance
7. Brexit and other geopolitical risks
8. Payment card security standards
9. Basel III capital and liquidity requirements
10. FATCA and other tax reporting regulations.