MDL (Multidistrict Litigation)

An MDL (multidistrict litigation) is a federal procedure consolidating similar civil matters filed across different districts into one court for coordinated pretrial proceedings. MDL structures introduce bellwether trials and aggregated settlement mechanisms that behave differently, as an asset class, from a single-plaintiff matter proceeding independently.

Multidistrict litigation, commonly abbreviated MDL, is a federal procedural mechanism that consolidates civil matters sharing common factual questions, typically mass tort or product liability matters filed by many plaintiffs across many districts, into a single court for coordinated pretrial proceedings, before individual matters are returned to their originating districts for trial or resolved through an aggregated settlement process. MDL structures matter for this platform's modeling because they behave as a genuinely different asset class from a single-plaintiff matter proceeding independently: bellwether trials, a small number of representative matters tried first to inform the valuation of the broader consolidated docket, produce outcome signals that affect the pricing of every other matter in the same MDL, a correlation structure that does not exist in an ordinary, independently proceeding case. Duration in an MDL context is also structurally different, often extending years beyond a comparable single-plaintiff matter's typical timeline, and settlement, when it occurs, frequently proceeds through a structured allocation process across thousands of claimants rather than a single negotiated figure. An institution underwriting positions inside an MDL needs a distinct modeling approach that accounts for bellwether correlation and aggregated settlement mechanics, rather than applying the same single-plaintiff outcome and duration models used elsewhere in its book.