How to Short Singapore residential?

[quidam]

... Since govt allows foreigners to own landed (but limited to Sentosa Cove), ...

This is a common misconception. Foreigners, if approved by the relevant authorities, are ALLOWED to own landed properties not just in Sentosa Cove; there is just fewer restrictions in Sentosa Cove ownership. Check this SLA page for details:

http://www.sla.gov.sg/htm/ser/ser0306.htm

There is also a link to an FAQ in there. The existence of the FAQ on foreign landed property ownership and the kind of questions in it seems to suggest that approval is more common than most believe. According to an earlier CNA report, rate of foreign land ownership hovers around 3.5% (of what, that wasn't elaborated):

http://www.channelnewsasia.com/stories/s...74/1/.html