Previously ratings of ibca limited were recognized for laf purpose . ibca limited conducted its rating business since 1978 . fitch investors service l . p . was established in 1914 and started its rating business in 1922 Ibca limited自一九七八年起经营信贷评级业务, fitch investors service l . p .于一九一四年成立,自一九二二年起从事信贷评级业务。