Dynamic Data – why?
Besides static fund data, which is suitable for submission of current fund information, there is also the need to process another type of data, so-called “dynamic data”. The main characteristic of dynamic data is the ability to store and transmit periodically changing or historical values. Application scenarios for dynamic data are not only fund prices, but also MiFID ex-post cost data or other information requiring time periods.
Dynamic Data – different code category “OFDY000XXX”
The most significant characteristic of dynamic data is the relation of each value to a specific date or a specific period. Due to this concept, which is different to static data, openfunds has introduced a new code category, starting with “OFDY”. The concept of dynamic data covers two subsets, the “as of” data and the “period” data. Only the combination of “Value” and “Date” clearly defines a data set in the historical context. For “as of” data, each value is linked to a “Reference Date”, whereas each value of a time period is connected to a “Period Start Date” and “Period End Date”.
“As of” vs. “period” data
“As of” data
Typical data fields of this category are dynamic data values such as Net Asset Values (“NAV”), Asset under Management, Total Shares Outstanding and Dividends etc. A mandatory relation between the actual value and the corresponding date (“Reference Date”) defines all these data fields. To correct values or to provide deletion instructions, openfunds recommends resubmission of the data field with the corrected/empty value and its corresponding date.
Data fields of this type do have a precise period they are valid for. Typical examples are ex-post cost-related data fields (e.g. required by MiFID II). These fields do not use one “Reference Date”, but do have two corresponding date fields, the period start- and end-dates. Please note that generally all period start and end dates of dynamic data, e.g. ex-post data, are in the past.
In theory, “period” data could consist of overlapping or not adjacent periods; nevertheless, in practise most data fields will use the time line to have adjacent sequences. In case of corrections or deletions, resubmission of the corresponding time period with corrected/empty value is recommended.
“OFDY100000 General Reference Date” – lean approach for “as of” data
As a fundamental condition, each “as of” data field is linked to a corresponding “Reference Date”, defining when the corresponding value applies (see following table for some examples).
In a regular dynamic data submission, several data fields usually refer to the same “Reference Date”. In the proper meaning of this concept, each data point could be submitted with its corresponding date. Given the fact that this results in redundancy, openfunds has introduced the “OFDY100000 General Reference Date”. It replaces the “Reference Date” information of each data point. Therefore, please keep in mind to use the “General Reference Date” with great care when providing both: “General Reference Date” and the specific “Reference Date” of some fields.
It is possible to mix the “OFDY100000 General Reference Date” and specific Reference Dates. If both dates are used in a submission, the specific date overrules the “OFDY100000 General Reference Date” wherever it is applied (see the following table for an example).
This example shows a use case, which is common practice. Here, the “OFDY100000 General Reference Date” is used as a reference for all values except for the dividend information, because dividends usually do not apply every day and information is often submitted in advance of the “OFDY005010 Dividend Ex Date”). As you may note, the fields “OFDY000036 Valuation NAV Date” and “OFDY000071 AuM Share Class Date” do not need to be provided as the “OFDY100000 General Reference Date” indicates the required reference date.
Due to the complexity of “period” data, the “OFDY100000 General Reference Date” does NOT apply for any data field requiring period start and period end date. All those data fields have to be accompanied by their specific OFDY-fields for period start and period end date information.
Level reference – Fund level vs. Share Class level
Similar to the openfunds static data field range (OFST…), dynamic data can refer to different levels of a fund (fund-, share class- or listing field level). The majority of the dynamic data fields defined by openfunds are on share class level (mostly prices, but also MiFID ex-post cost data) and require the submission of the corresponding “OFST020000 ISIN”. For certain price data fields on fund level (e.g. “OFDY000060 AuM Fund”), additional static data fields are mandatory (e.g. “OFST010410 Fund Currency”).
Similar to static data, values of fund level fields must be consistent for all share classes within the same fund or sub fund.
Currency related dynamic data
Certain dynamic data points on fund and share class levels are not only linked to a “Reference Date” or a “Time Period”, but are also directly linked to currency information. Similar to the concept of using a “General Reference Date” to avoid unnecessary redundancies, the data fields “OFST020540 Share Class Currency” and “OFST010410 Fund Currency” are used once per line but apply for all currency related values in this line.
In case there is the need to submit additional, currency converted data, openfunds offers the option to apply a suffix to the openfunds field identifier which specifies the currency in which the value is expressed. The suffix consists of an underline (“_”) and the currency code (ISO 4217) (see sample below).
Template samples for ‘as of’ data and ‘period’ data
The following two Excel files contain templates for transmitting dynamic data. This is just for illustration purpose as one can combine these two files to one single file:Template for ‘as of’ dataTemplate for ‘period’ data
Empty field means: “delete”
For transmission of dynamic data, the same concept as for all openfunds transmissions apply: Empty fields means “delete”. For more information, please read the whitepaper https://www.openfunds.org/knowledge/whitepapers/empty/.
|1.1||2017-10-04||Final||Updated charts. Added templates.|
If you wish to read or download this white paper as PDF, please click here.