With MiFID II directive being in force in January 2018, Approved Publication Arrangements (APA) data should increase transparency in the OTC markets by publishing quotes for pre-trade transparency, and trades for post-trade transparency. An APA is an organisation authorised to publish trade reports on behalf of investment firms according to Article (4)(1)(52) MiFID II.
In finance, people usually use APA to refer to the data they provide, and not only the organization which provides the data.
Background.
APAs, Approved Reporting Mechanisms and Consolidated Tape Providers are new categories of Data Reporting Services Providers (DRSPs) that did not exist under MiFID I.
For the "APA data", one distinguishes three asset classes: bonds, derivatives of all kind (interest rate/Credit/FX/Commodity/Equity), and Structured Finance. Each APA data record contains information such as
Example.
A (shortened) example record in JSON format looks like this:
 {
 "TRADING_DATE_AND_TIME": "2019-08-08T03:14:15.926000+00:00",
 "INSTRUMENT_ID_TYPE": "ISIN",
 "INSTRUMENT_ID": "HU0000403118",
 "PRICE": 111.2548,
 "VENUE_OF_EXECUTION": "SINT",
 "PRICE_NOTATION": "PERC",
 "PRICE_CURRENCY": "HUF",
 "NOTATION_OF_QUANTITY_IN_MEASUREMENT_UNIT": "N/A",
 "QUANTITY_IN_MEASUREMENT_UNIT": "N/A",
 "QUANTITY": 1,
 "NOTIONAL_AMOUNT": 500000000,
 "NOTIONAL_CURRENCY": "HUF",
 "PUBLICATION_DATE_AND_TIME": "2019-08-08T07:58:31.154134+00:00",
 "VENUE_OF_PUBLICATION": "BAPA",
 "TRANSACTION_ID": "12345678-aaaa-bbbb-cccc-1234567890ab",
]
References.
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Further reading: