# India to Sierra Leone trade anomaly | HS 731821

A reported **spike** movement was recorded in 2024 for Iron or steel: non-threaded spring washers and other lock washers. This is a research prompt, not a causal conclusion or commercial forecast.

- Anomaly z-score: 2.1
- Severity: 51.3%
- Reported market imports: $8.8K
- Momentum: 5,741.5%
- Exporter market share: 19.3%
- Reported suppliers: 9

## How to investigate

Compare the route history, supplier concentration, access conditions, tariffs, product requirements, logistics, pricing, and current market information before acting.


## Data sources

- Primary trade series: OECD (2025), Balanced international merchandise trade statistics (BIMTS) - HS2017-6D, OECD Data Explorer (accessed on 2026-09-03). [OECD Data Explorer](https://data-explorer.oecd.org/) - [OECD Terms & Conditions](https://www.oecd.org/termsandconditions/)
- CEPII BACI bilateral trade flows (202601): [dataset page](https://www.cepii.fr/CEPII/en/bdd_modele/bdd_modele_item.asp?id=37) - [BACI documentation](https://www.cepii.fr/DATA_DOWNLOAD/baci/doc/baci_webpage.html) - [Etalab 2.0 Open Licence](https://www.etalab.gouv.fr/wp-content/uploads/2018/11/open-licence.pdf)

This page presents derived Yugalinks views of reported observations and calculated indicators.