Mark to market
The process of calculating the value of a trade or position by referencing market conditions. Conditions could include interest rates, fx rates, stock or futures prices at an exchange.
MPOR
Margin Period of Risk. The time period over which a risk measure is derived. For instance the time it might take to limit the risk in a portfolio could be 5 days, hence the MPOR would also be 5 days.
MT527
A SWIFT message format, read more at https://www.iso20022.org/15022/uhb/finmt527.htm