An instrument (usually issued together with a bond or preferred stock) that entitles the holder to buy at a specified price a proportionate amount of common stock within a specified period of time. Derivative contracts are only reportable on the TIC D reports. Embedded derivatives that are not bifurcated under FAS 133 should not be separated from the host contract and should be reported on the TIC B reports. However, if an embedded derivative is bifurcated, the derivative should be excluded from the B reports.