Patent ID: 8364572
Filing Date: 2013-01-29
Classification: G06Q

Abstract:
1. A system comprising: memory operable to store at least one program; and at least one processor communicatively coupled to the memory, in which the at least one program, when executed by the at least one processor, causes the at least one processor to: receive data indicating at least two returns of an investment portfolio comprising one or more assets, said returns being calculated on a periodic basis and indicating a gain or loss for the investment portfolio for each period; generate a histogram of the returns data by plotting the returns data on one axis of the histogram against a standard deviation of the returns data on a second axis of the histogram; determine a first area under a curve of the histogram in a first interval comprising a positive standard deviation of the returns; determine a second area under the curve of the histogram in a second interval comprising a negative standard deviation of the returns; calculate a bias ratio wherein a numerator of the bias ratio comprises the first area and a denominator of the bias ratio comprises the second area; and analyze the calculated bias ratio to determine reliability of the returns data wherein the bias ratio is calculated using the formula: where r i is a return, σ represents standard deviation, K is a positive, non-zero constant, and ε indicates that r i is within the closed interval [0,+1.0σ] in the case of the numerator and within the half open interval [−1.0σ,0) in the case of the denominator.