<prompt> Translate the following text to EnglishVipimo vya NIPAC na FFA vinazingatia akiba kama mtiririko kutoka kwa uzalishaji wa sasa wa uchumi na haijumuishi mabadiliko katika thamani ya soko ya portfolios zilizopo za kaya.  <response>: Both the NIPA and FFA measures focus on saving as a flow from the economys current production and do not include changes in the market value of households existing portfolios. 