In what way does Bloomberg calculate the possession of billionaires?

Due to the reduction of $ 3.6 billion, Bidzina Ivanishvili has been reduced to Bloomberg's world billionaire rankings and is no longer among the 500 wealthy people. According to the platform, Ivanishvili lost $ 3.2 billion in 3 weeks of April. Bloomberg's billionaire rankings feature 500 richest people on the planet. If ...