<prompt> Translate the following text to SwahiliWhen stock prices fell by a quarter in one day in 1987, the American economy barely noticed, thanks largely to quick action by Greenspans Federal Reserve.  <response>: Wakati bei ya hisa ilipopungua kwa robo katika siku moja mnamo 1987, uchumi wa Marekani haukuona, shukrani kwa hatua ya haraka ya Hifadhi ya Shirikisho ya Greenspan. 