Financial data licensing defines permitted uses of a dataset. Distinguish internal research, redistribution, derived outputs, retention and attribution before shipping a quant result.
Financial data licensing
Financial data licensing is the set of permissions and conditions governing how a person or organisation may access, use, store and share a dataset. For a quant team, it determines whether data can feed an internal backtest, appear in a client product or accompany a public research paper. Buying a subscription or receiving a working API key does not, by itself, establish permission for every downstream use.
The financial data vendor supplies the feed; the applicable agreement defines the authorised activity. Delivery capability and usage permission answer different questions.
The same file, different decisions
Consider a fictional contract that permits research inside the licensed team and prohibits redistribution of the raw data. It says nothing in this example about external publication of transformed outputs or continued use after expiry.
The team can perform the permitted internal research. It cannot attach the raw file to a public code repository merely to make its backtest reproducible. A citation gives credit, but it does not supply the missing redistribution permission. Nor does the file become freely distributable because the team paid for access.
Hypothetical rights matrix: analysing raw data inside the licensed team is permitted; uploading the raw file publicly is forbidden; publishing transformed outputs and using a snapshot after expiry remain unconfirmed under the stated clauses.
Original hypothetical contract illustration. Only internal research permission and the raw-redistribution prohibition are specified; derived-output and post-expiry rights require their own terms.
Unconfirmed is a separate outcome. A chart, signal, fitted model or aggregated table can raise a different contractual question from a raw-file upload. Calling an output “derived” does not settle that question. Check the agreement's definition, permitted recipients and publication conditions before treating the output as cleared. This example is a reading exercise, not an actual provider's licence.
Read the licence around the intended action
A useful permission record describes the data product and the proposed use precisely enough to compare them with the agreement.
Dimension
Question for the proposed workflow
Licensed users and entity
Does the permission cover this team, affiliate, contractor or external recipient?
Purpose and processing
Does it cover research, live trading, automated processing, model training or the specific commercial application?
Distribution
Can raw records be displayed, exported, embedded in a report or delivered through another API?
Derived outputs
What transformations are covered, and may the resulting output leave the licensed entity?
Storage and termination
What copies, backups or audit records may remain, and may retained data still be used?
Attribution and notices
Which acknowledgement, ownership notice or source statement must travel with the output?
These are questions to resolve against the applicable terms, rather than rights presumed to exist in every licence. An order form, product schedule or upstream exchange condition may matter alongside a vendor's general terms. Record the answer for the actual intended use, including any restrictions and written approvals.
Real terms demonstrate why these distinctions matter. As checked on 27 October 2026, Nasdaq Data Link's published terms, §§1.1–1.5, distinguish internal usage, derived data, external distribution and third-party conditions. Section 1.2 sets conditions for creating derived data and separately restricts its distribution outside the client unless the order form provides otherwise or prior written approval is obtained. Section 6.3 ends usage rights on termination or expiry of the applicable order form and requires deletion or purging, with stated regulatory and audit retention exceptions. The page announces updated terms from 1 November 2026. Recheck the current terms and applicable agreement for the dataset and use concerned.
Retention and reuse therefore need separate answers. Keeping a copy for a permitted audit purpose does not automatically authorise another research run. For data lineage, connect the dataset version and source to the applicable permission record, so an old snapshot does not silently acquire a new purpose.
Open access still needs a scope check
A dataset can have broad reuse rights, but the grant still has boundaries. The Bank of England's legal page places Database reproduction under the UK Open Government Licence unless otherwise stated, specifies an attribution statement for SONIA data, and excludes selected third-party exchange-rate series from that licence. It also distinguishes Database terms from the general website permissions.
The operational lesson is to identify the particular series and its rights statement, rather than infer permission from the host institution or the absence of a download charge. Attribution is one condition to satisfy; it is not a replacement for checking the scope of the grant.
Keep the research deliverable within its permissions
Plan the public deliverable before building the pipeline. If raw redistribution is unavailable, a project may instead publish its code, methodology and a clearly labelled synthetic fixture, while directing authorised users to obtain the original data through the provider. That route still requires checking what results, excerpts or derived outputs may be published. Synthetic data should be independently constructed, rather than a disguised copy of restricted records.
For the professional purpose checks behind this workflow, Ethics and Responsible Data Use has a public preview and full lesson for members. It connects vendor-contract duties and purpose limitation to research conduct. Specific redistribution and retention permissions come from the applicable data agreement.
Sources
Nasdaq Data Link, Terms and Conditions, §§1.1–1.5 and 6.3. Checked published provisions on internal use, derived data, third-party terms, distribution and termination; product-specific agreements can alter the applicable scope.
Bank of England, Legal, “Copyright” and “Bank of England Database,” page updated 15 October 2026. Checked Database reuse terms, SONIA attribution and third-party exclusions. The rights matrix above is an original fictional example, separate from both providers' actual terms.
