## What is half the contrast?

What is half the contrast?
Quasi-variance is a measure of data that can be used to estimate potential downside risks for an investment portfolio. Quasi-variance is calculated by measuring the dispersion of all observations that fall below the mean or target value of a set of data. Half of the variance is the mean of the squared deviations of the values that are below the mean.
free forex signals

The main concerns
The quasi-variance equation can be used to measure downside risk for a portfolio.
Semivariance considers only observations that are below the mean of the data set.
https://www.freeforex-signals.com/

Understanding quasi-contrast
The semi-contrast formula is
\ start {align} & \ text {Semivariance} = \ frac1n \ times \ sum ^ n_ {r_t<\ text {Average}} (\ text {Average} -r_t) ^ 2 \\ & \ textbf {where:} \ \ & n = \ text {Total number of below average notes} \\ &r_t = \ text {Observed value} \\ & \ text {Average} = \ text {Average or target value of data set} \ end {alignment}

Half the variance =
N
1
X
s
R

N
(Medium - p
R
)
2

Where:
n = total number of notes below average
s
R
= Observed Value
Average = the mean or target value of the data set

What does the pseudo-contrast tell you?
Contrast is similar to quasi-contrast, but it only considers below-average observations. Semivariance is a useful tool in portfolio or asset analysis because it provides a measure of downside risk.

While standard deviation and variance provide measures of volatility, quasi-variance only looks at the negative volatility of an asset. Quasi-variance can be used to calculate the average loss that a portfolio can incur because it deviates all values above the average, or above, the investor's target return.
https://www.freeforex-signals.com/
For risk averse investors, identifying optimal portfolio allocations by minimizing partial covariance can reduce the likelihood of a significant depreciation of the portfolio.