In a related move, Facebook has instructed operators of secondary markets such as SharesPost to suspend trading after Friday, according to PrivCo CEO Sam Hamedah.

FORBES: The Facebook Roadshow Is Coming Next Week

This limited secondary market, the rail operators argue, means that they cannot justify spending large sums on rolling stock unless they are sure of keeping their franchises long enough to recover their investments.

ECONOMIST: After privatising

Shopping mall operators like BR Malls (BRML3) are raising capital in secondary offerings, and investors are oversubscribing to new issues.

FORBES: Brazil Housing Market Booming 'Til 2017