Discovery Pool

A discovery pool is a defined subset of plaintiffs in an MDL — larger than the small group ultimately selected as bellwether trial candidates but smaller than the full docket — subjected to full, individualized fact discovery, including depositions, medical record production, and expert case-specific reports, for the purpose of developing a representative sample of claim types, injury severities, and factual circumstances before bellwether selection narrows the pool further. Discovery pool selection is typically negotiated between the PSC and defense counsel and approved by the transferee court through a case management order specifying the pool size and the criteria — often a mix of plaintiff picks, defense picks, and random or stratified selection — used to assemble a sample that fairly represents the docket's overall composition rather than only its strongest or weakest claims. Because full individualized discovery is expensive and time-consuming, conducting it against a discovery pool rather than the entire docket allows the parties and the court to develop the factual record needed to assess claim value and select bellwether candidates without incurring the cost of full discovery against every claim, a cost that would be prohibitive across dockets numbering in the thousands. The results of discovery pool development, including any patterns in claim strength that emerge across the sample, often inform both bellwether selection and the eventual design of a settlement grid's compensation criteria.

Discovery pool results are one of the earliest sources of granular, claim-level data available in a docket, and funders track which of their financed claims fall within the discovery pool because those claims will generate the earliest concrete evidence of claim strength, well before any bellwether verdict or settlement grid exists.

A financed claim selected into the discovery pool carries both elevated near-term diligence value and elevated exposure, since a weak result in individualized discovery can adversely affect that specific claim's negotiating position even if the broader docket's aggregate settlement value is unaffected.