OpenBB-finance/OpenBB · warning · EmptyDataError

The request was returned empty.

Error message

The request was returned empty.

What it means

Raised in FREDYieldCurveFetcher.extract_data (openbb_fred/models/yield_curve.py:76) when the delegated FredSeriesFetcher result is falsy for the requested yield_curve_type ('monthly' or 'daily' fixed Treasury CMT series sets). The code then immediately calls data.result, so this guard mainly protects against a None/empty fetcher response. In practice the more common failure is an empty .result list, which passes this check and surfaces as empty output rather than this error.

Solutions

1. Confirm a valid fred_api_key is configured.
2. Retry after a minute to rule out rate limiting.
3. If the call 'succeeds' but returns no rows, fetch the CMT series directly (e.g. DGS10) via fred_series to confirm availability.

from openbb_core.provider.utils.errors import EmptyDataError

try:
    curve = obb.economy.fred.yield_curve(yield_curve_type=t)
except EmptyDataError:
    curve = None  # degrade gracefully, e.g. serve last cached curve
    curve = load_cached_curve(t)

When it happens

Trigger: economy/fred yield-curve while rate limited such that the internal fetcher returns nothing; a malformed credentials dict leaving api_key empty; unexpected fetcher API changes returning a falsy result object.

Common situations: High-frequency jobs hitting FRED's 50-req/min cap; missing fred_api_key causing the inner series fetch to fail into an empty result.

Related errors

• The request was returned empty.
• Data not found
• Error: No data to plot.
• "\n".join(messages) # messages contain e.g. 'No data was…
• No data found for the given query. Try adjusting the…

AI-assisted analysis of OpenBB-finance/OpenBB@3e071fcc2c (2026-08-14). Data as JSON: /api/errors/9ee03924e584b90d. Report an issue: GitHub.

Appendix: source

Thrown at openbb_platform/providers/fred/openbb_fred/models/yield_curve.py:76

    def transform_query(params: dict[str, Any]) -> FREDYieldCurveQueryParams:
        """Transform query."""
        return FREDYieldCurveQueryParams(**params)

    @staticmethod
    async def aextract_data(
        query: FREDYieldCurveQueryParams,
        credentials: dict[str, str] | None,
        **kwargs: Any
    ) -> list[dict]:
        """Extract data."""
        api_key = credentials.get("fred_api_key") if credentials else ""
        series_ids = ",".join(list(YIELD_CURVES[query.yield_curve_type]))
        fetcher = FredSeriesFetcher()
        data = await fetcher.fetch_data(
            {"symbol": series_ids}, {"fred_api_key": api_key}  # type: ignore
        )
        if not data:
            raise EmptyDataError("The request was returned empty.")
        results = [d.model_dump() for d in data.result]  # type: ignore

        return results

    @staticmethod
    def transform_data(
        query: FREDYieldCurveQueryParams, data: list[dict], **kwargs: Any
    ) -> list[FREDYieldCurveData]:
        """Transform data."""
        # pylint: disable=import-outside-toplevel
        from pandas import Categorical, DataFrame, DatetimeIndex

        df = DataFrame(data).set_index("date").sort_index()
        df.index = df.index.astype(str)
        dates = query.date.split(",") if query.date else [df.index.max()]  # type: ignore
        df.index = DatetimeIndex(df.index)
        dates_list = DatetimeIndex(dates)
        maturity_dict = YIELD_CURVES[query.yield_curve_type]

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