‹ Tier 3: Ancillary Capital CA-2.2.5 › CA-2.2.4 Tier 3 capital may only be used to satisfy an investment firm's Position Risk Requirement (PRR). It is limited to 250% of the portion of Tier 1 capital also used to meet the Position Risk Requirement (PRR). ‹ Tier 3: Ancillary Capital CA-2.2.5 ›