The FCA said the bank's behaviour mirrored previous misconduct, for which it was also fined in 2013 and had restrictions imposed in 2018.
The MoU will focus on developing the FinTech sector, promoting sustainable finance, and increasing awareness of sustainable investment in Thailand and other ASEAN countries.
The new trading system, developed in partnership with Nasdaq, will boost order execution efficiency and increase capacity for large volume trading.
FPIs will be allowed to invest in mutual fund schemes except those categorised as "thematic", purportedly to prevent higher volatility for entire sectors.
AIA and PICC said the incorrect data in their solvency reports was due to an incorrect understanding of the rules as well as calculation errors.
The fee exemptions are intended to support fund managers companies in giving more weight to sustainability-driven securities investment.
MAS chief fintech officer Sopnendu Mohanty said the integration of the two payment networks is "ready and waiting for launch".
Listing rule changes introduce a nine-year tenure limit for independent directors and requirements for enhanced remuneration disclosures in annual reports.
The revised guidelines introduce higher standards on governance, internal controls and integrity in rating processes and assessments.
The move is aimed at channelling resources into sectors that align with the national agenda, such as information technology and advanced manufacturing.