Rotation

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Rotation

An active asset management strategy that tactically overweighted and underweighted certain sectors, depending on expected performance. Sometimes called sector rotation.

Sector Rotation

An investment strategy in which a portfolio overweights or underweights certain sectors in accordance with expected performance. Sector rotation is a form of active investment management; the portfolio manager observes market trends and alters the composition of the portfolio in order to earn the highest possible return. Sector rotation is fairly high risk, as a portfolio's systematic overweighting and underweighting means that is not efficiently diversified. See also: Markowitz portfolio theory.
References in periodicals archive ?
Caption: Figure 2: Typical parallel ankle robot designs with or without aligned rotation center between the robot and the ankle joint: (a) misaligned rotation center, (b) can be programed to have aligned rotation center but will sacrifice workspace, and (c) aligned rotation center without sacrificing workspace.
Distance R' between O and instantaneous rotation center [O.sub.p]' is defined with [V.sub.[GGAMMA]] and [V.sub.s] in Eq.
The ilium thickness and width reached its peak 25 mm above the rotation center, approximately at the acetabular dome, and decreased quickly to approximately, especially 2 cm above the doom.
[v.sub.1] and [v.sub.2] are the speed of the left and right drive motors, respectively, [r.sub.1] and [r.sub.2] are the distance of the left drive unit and right drive unit, respectively, from the rotation center. Therefore, the robot rotation center will not depend on the robot gravity center and the position of drive units in the robot.
Through examining the existing robots for ankle rehabilitation, a few improvements could still be identified as follows: (1) the rotation center of the foot pedal should easily point to the rotation center of the ankle joint via mechanical configuration; (2) the robot should be friendly and stimulate the patient to participate in ankle training, encouraging the patient to self-balance both their ankle joints during exercise; and (3) maintainability and modularity might be improved.
The accuracy of the bored lens arrays is dependent on the accuracy of the diamond tool geometry and the exact position of the diamond tool in relation to the rotation center of the spindle.
One problem associated with this design is the misalignment between the rotation center of the end-effector and the actual rotation center of the pelvis.
This robotic platform consists of two three-DOF symmetric layer-stacking mechanisms, which can execute ankle internal/external rotation, dorsiflexion/plantarflexion, and inversion/eversion exercises while the rotation center of the distal end of the robotic platform always coincides with patient's ankle pivot center.