The tax straddle rules:

A. Disallow a loss from a sale of stock or security if a taxpayer has acquired substantially identical stock or security within a period beginning 30 days before the date of sale and ending 30 days after the date of sale

B. Require taxpayers to recognize gains if he/she enters into a short sale of property that is same or substantially identical to an appreciated financial position he/she is holding

C. Govern character of gain/loss from short sales

D. Allow realized loss to be taken during a year only to the extent that the amount of such loss exceeds unrecognized gain with respect to one or more positions which are offsetting to the position generating the loss