1. A system for a server application in a server device, to adjust asset value and availability, to mitigate speculative market manipulation and pure speculative trading transactions in a prediction market, the system being embodied in a non-transitory computer readable medium located in the server device, comprising: a target participant selection module; a value and availability adjustment module further comprising at least one of a restrictor sub-module of timing availability, an estimator sub-module based on a holding time; and an estimator sub-module based on a future event; and a display and order execution module; wherein said value and availability adjustment module are configured to produce data records of an asset's adjusted value and availability and of the asset's data records of unadjusted value and availability, pertaining to a prediction market asset.