However, agencies may recognize market adjustments on bills, notes, bonds, and zero coupon bond securities classified as available-for-sale.

WHITEHOUSE: M-03-01, Business Rules for Intragovernmental Transactions, Attachment B | The White House

Effective October 1, 2002, for intragovernmental investments with the Bureau of the Public Debt (BPD), BPD and trading partner agencies will use the interest method for amortization on market-based notes, bonds, and zero-coupon bond securities.

WHITEHOUSE: M-03-01, Business Rules for Intragovernmental Transactions, Attachment B | The White House

But reasonably sophisticated investors can create the same product themselves by purchasing a risk-free zero-coupon Treasury bond and call options on a stock index, such as XSP options traded on the Chicago Board Options Exchange.

FORBES: Guaranteed to Go Up