Known limitations
These are the confirmed limits of the product and of the measures it produces.
Product scope
NL Analytics covers English earnings-call transcripts. You cannot upload your own text, and other document types are not currently available — see corpus scope.
There is no public end-user API. The product is used through the UI and CSV downloads; these docs do not cover API authentication, endpoints, schemas, SDKs, rate limits, or automation workflows because no such public interface exists.
Coverage
The corpus is LSEG earnings-call transcripts available to NL Analytics. Coverage varies by country, sector, firm, and time — check coverage for your sample before interpreting variation.
The refresh cadence is roughly biweekly but not guaranteed.
Search and filtering
Query design affects every metric. You may need to refine keywords, include plurals manually, validate suggested terms, and balance precision against recall — see search quality.
Specific companies cannot be pre-selected before a search. Sector, country, section, and speaker restrictions are available as search options; to focus on particular firms, filter the exported output or the Snippet Tool view after the search.
Very broad queries are rejected when their estimated matches exceed a share of all sentences in the corpus (the default threshold is 3 percent). Narrow the query or contact support if a broad search is essential.
Risk Tool search results are retained for 90 days. Search inputs remain available, but older searches must be rerun before their matched sentences can be inspected again in the Snippet Tool.
Metrics
Metrics are raw integer sentence counts built from explicit queries and curated word lists — see metric definitions. They are not black-box LLM scores, causal estimates, investment advice, forecasts, compliance determinations, or complete summaries of business risk.
nr_of_sentences always measures the full transcript. It does not adjust when a search restricts matching by section or speaker or includes adjacent sentences — use nr_of_sentences_filtered as the denominator in those cases, as described in normalization guidance.
Researchers own construct validation, sample design, normalization choices, crosswalk checks, and empirical interpretation.
Exports
Search result CSV files include all earnings calls in the selected date range, including rows where no sentences satisfy the query — see Keep zero rows.
Exports can contain provenance columns and columns for metrics under development that these docs do not define.
The GVKey crosswalk is a convenience output for downstream joins. Verify match quality before relying on joined results.
Compliance
NL Analytics does not currently hold formal compliance certifications, and these docs make no compliance, certification, or regulatory-assurance claims.