Ms Stewart has previously claimed that she had instructed her stockbroker to sell her ImClone shares as soon as their price fell below a certain threshold.
Previous governments have tip-toed close to the nuclear threshold, but pulled back for fear of the high price India would pay for breaking the nuclear taboo.
In January, the southern city of Zhongshan increased a price cap on residential home sales, and the western city of Chongqing raised the minimum threshold where a property holding tax applies.