# Return on security investment

## How do you calculate return on security?

The ALE is calculated by multiplying the annual rate of occurrence (ARO) by the single loss expectancy (SLE). ARO is the probability of a security incident occurring within a year. This is a judgment call by the CISO based on historical incidents. SLE is the total financial loss from a single security incident.

## What is Rosi?

ROSI or Return On Security Investment is simply a way to calculate if a security control is worth implementation or not. … In a very simplistic way, to calculate ROSI, you will calculate monetary risk for a specific incident and subtract the cost of implementing a security control to mitigate the risk.

## What is a 100% return on investment?

Return on Investment (ROI) is the value created from an investment of time or resources. Most people think of ROI in terms of currency: you invest \$1,000 and you earn \$100, that’s a 10% return on your investment: (\$1,000 + \$100) / \$1,000 = 1.10, or 10%. If your ROI is 100%, you’ve doubled your initial investment.

## How do I calculate return on investment?

ROI is calculated by subtracting the initial value of the investment from the final value of the investment (which equals the net return), then dividing this new number (the net return) by the cost of the investment, and, finally, multiplying it by 100.

## What is return on security?

As most of us know, return on security investment is basically the amount of risk reduced, less the amount spent, divided by the amount spent on controls. Net amount of risk per amount of control is the essential formula for any “return on” ratio — return on investment, equity, assets and so on.

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## What is ale in cyber security?

ALE. Definition. Annual Loss Expectancy. The Dollar amount of a device malfunctioning, damaged, lost, or stolen per year SLE x ARO = ALE SLE=Single Loss Expectancy in Dollars.

## What is a realistic return on investment?

Individual investors, on average, said they would need to earn an annual return of 8.5 percent above inflation to achieve their investment goals. … And 70 percent of those investors said they can realistically reach that level of return over the long term.

## What is a 50 return on investment?

For example, if you had a net revenue of \$30,000 and your investment cost you \$20,000, your ROI is 0.5 (or 50%). ROI = (gain from investment – cost of investment) / cost of investment.

## What is a reasonable return on investment?

Generally speaking, if you’re estimating how much your stock-market investment will return over time, we suggest using an average annual return of 6% and understanding that you’ll experience down years as well as up years.

## How much will \$500 be worth in 20 years?

How much will an investment of \$500 be worth in the future? At the end of 20 years, your savings will have grown to \$1,604. You will have earned in \$1,104 in interest.

## How do you find 10 return on investment?

Top 10 Ways to Earn a 10% Rate of Return on Investment

1. Real Estate.
2. Paying Off Your Debt.
3. Long-Term Stocks.
4. Short-Term Stock Trading.