Abstract: An exemplary aspect comprises a computer system comprising: (a) one or more servers that receive electronic data describing prices for a first category of futures positions; and (b) one or more processors that calculate an index value at a specified time based on one or more weighted price changes for said first category of futures positions, wherein said index value has a target exposure to one or more yields for said first category of futures positions. In one or more exemplary embodiments, the computer system further comprises one or more processors that receive electronic data describing prices for a second category of futures positions, wherein the index value at the specified time is based on one or more differences between weighted price changes for the first category of futures positions and the second category of futures positions. Other exemplary aspects comprise related methods and software.

Abstract: An exemplary aspect comprises a computer system comprising: (a) one or more servers that receive electronic data describing prices for a first category of futures positions; and (b) one or more processors that calculate an index value at a specified time based on one or more weighted price changes for said first category of futures positions, wherein said index value has a target exposure to one or more yields for said first category of futures positions. In one or more exemplary embodiments, the computer system further comprises one or more processors that receive electronic data describing prices for a second category of futures positions, wherein the index value at the specified time is based on one or more differences between weighted price changes for the first category of futures positions and the second category of futures positions. Other exemplary aspects comprise related methods and software.

Abstract: A lift and propulsion device is presented which utilizes Bournelli's Principle and the principle of relative motion to create lift. A series of discs are arranged in coaxial alignment. Each successive disc rotates in a direction opposite from the direction of rotation of the disc above it. Air is introduced at the lower outer circumferential surface of the first disc. The introduction of air at this point, as well as the relative motion of the counter-rotating surfaces between the first and second discs creates a large amount of lift. Air is introduced onto the opposite outer circumferential lower surface of the second disc, in the direction of rotation of the second disc. The introduction of this air creates a large amount of lift between Discs B and C. Each successive disc rotates in an opposite direction from the disc above it and has air interjected onto the lower circumferential surface of that disc in the direction of rotation of the disc.