Abstract: An endless track for a tracked vehicle includes a track body and a plurality of cores at least partially embedded the track body, each core having at least one roller surface configured to contact an outer flange of a track roller when the track roller is engaged with an inner surface of the track body, and at least one protrusion configured to contact an inner flange of the track roller when the track roller is engaged with the inner surface of the track body. The track roller is configured to simultaneously contact a first core and an adjacent second core. A distance between the first core and the second core is selected such that about 0.2% of a flange diameter of the track roller extends perpendicular to an axis between a first contact point on the first core and a second contact point on the second core.

Abstract: An exchange-traded financial instrument having a price that tracks an underlying benchmark, the underlying benchmark being a security or commodity that is itself traded. A contract for the financial instrument between a buyer and seller is not contingent upon the delivery of the underlying benchmark. A net carrying charge (credit or debit), defined as the difference between the investment yield of the underlying benchmark and a cost of financing ownership of the underlying benchmark using the generally accepted industry standard financing rate for that benchmark, is credited or debited, accrued, or built into the price of the derivative for both buyer and seller of the financial instrument, typically nightly. In one embodiment, the underlying benchmark is a U.S. Treasury security, and preferably a specific U.S. Treasury security such as the on the run (OTR) 10 Year Treasury note. Other single contract spread and ratio instruments are also disclosed.

Abstract: An exchange-traded financial instrument having a price that tracks an underlying benchmark, the underlying benchmark being a security or commodity that is itself traded. A contract for the financial instrument between a buyer and seller is not contingent upon the delivery of the underlying benchmark. A net carrying charge (credit or debit), defined as the difference between the investment yield of the underlying benchmark and a cost of financing ownership of the underlying benchmark using the generally accepted industry standard financing rate for that benchmark, is credited or debited, accrued, or built into the price of the derivative for both buyer and seller of the financial instrument, typically nightly. In one embodiment, the underlying benchmark is a U.S. Treasury security, and preferably a specific U.S. Treasury security such as the on the run (OTR) 10 Year Treasury note. Other single contract spread and ratio instruments are also disclosed.

Abstract: An exchange-traded financial instrument having a price that tracks an underlying benchmark, the underlying benchmark being a security or commodity that is itself traded. A contract for the financial instrument between a buyer and seller is not contingent upon the delivery of the underlying benchmark. A net carrying charge (credit or debit), defined as the difference between the investment yield of the underlying benchmark and a cost of financing ownership of the underlying benchmark using the generally accepted industry standard financing rate for that benchmark, is credited or debited, accrued, or built into the price of the derivative for both buyer and seller of the financial instrument, typically nightly. In one embodiment, the underlying benchmark is a U.S. Treasury security, and preferably a specific U.S. Treasury security such as the on the run (OTR) 10 Year Treasury note. Other single contract spread and ratio instruments are also disclosed.

Abstract: An exchange-traded financial instrument having a price that tracks an underlying benchmark, the underlying benchmark being a security or commodity that is itself traded. A contract for the financial instrument between a buyer and seller is not contingent upon the delivery of the underlying benchmark. A net carrying charge (credit or debit), defined as the difference between the investment yield of the underlying benchmark and a cost of financing ownership of the underlying benchmark using the generally accepted industry standard financing rate for that benchmark, is credited or debited, accrued, or built into the price of the derivative for both buyer and seller of the financial instrument, typically nightly. In one embodiment, the underlying benchmark is a U.S. Treasury security, and preferably a specific U.S. Treasury security such as the on the run (OTR) 10 Year Treasury note. Other single contract spread and ratio instruments are also disclosed.

Abstract: The present invention provides ballpoint pen ink compositions containing carbon black which are initially erasable and require little or no external pressure for ink delivery. The ink can be erased easily with a normal rubber eraser such as that found on pencils. The ink compositions of the present invention comprises: about 15% to about 40% of an aliphatic hydrocarbon, about 15% to about 40% of an aromatic hydrocarbon, about 1% to about 15% of a colorant, about 4% to about 40% of one or more of a preselected thermoplastic block copolymer, and about 5% to about 40% of a preselected parting agent.