BLACK control of market capitalisation on the JSE fell sharply last year and could decrease further in 2000 as several firms unbundle non-core assets, an investment firm said. BusinessMap, an investment strategy group which tracks the black economic empowerment process, said in its annual report that the black share of ownership could drop to 2,1% of the JSE’s market capitalisation from 5,5% in 1999. Its peak was reached in 1997, when the black stake in the bourse hit 9,3% on a frenzy of deal making in the corporate sector as blacks sought an entry into the mainstream economy from which they had been barred under apartheid rule.