Questions tagged [calculation]

A generic tag to understand the calculations in a specific case. Please give out a sample illustration and ask a specific question. Ideally should also be accompanied by specific subject tags like "credit-cards", "savings-account", "index-funds" etc.

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3
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2answers
713 views

How to calculate ROI on investments? [duplicate]

I looked through the previous questions, and couldn't find one that quite addresses my question. If I start with $1000, and through investing it goes to $1200(100 shares at $10 go to $12), I can say I ...
8
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5answers
71k views

How do I calculate net monthly salary (after taxes) in Germany?

If I were to say that my yearly, gross salary was 50,000 euros, then what would be my monthly net after-tax income? For example, this calculator looks OK to me: http://calculatenetsalary.com/...
4
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2answers
787 views

How can I calculate (approximate) the future value of my investments? Is this formula appropriate?

I want to check to see if I'm meeting my investment goals, so I want to project forward my assets given a growth rate and a monthly deposit amount. What is the best formula to use for this? Is this ...
2
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1answer
217 views

How can I check if my mortgage balance is correct?

Since I couldn't easily get my unpaid principal balance, I calculated my mortgage balance using a handful of online calculators. Today I took a look at the actual balance, and was rather surprised to ...
1
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1answer
290 views

Reasonable alternatives to using the Treasury rate as the risk free rate, e.g. for CAPM calculation?

For all practical purposes, the risk free interest rate is taken to be the short term Treasury bill interest rate. Let's say this rate is 0.5% per annum. But for an individual investor, if his bank ...
3
votes
1answer
300 views

How to determine withholding so at end of the year I neither owe more, nor get a refund?

A while back I was on a W2 job and I would get a large sum on my tax return. At one point I found a calculator that helped me figure out how to configure my W4 so that I would neither owe nor be owed ...
1
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1answer
918 views

How to calculate how far a stock price can drop before a broker would issue a margin call?

Let's say the margin requirement for a stock XYZ is 50%. The current price of XYZ is $150/share. Let us say I put in $100, and borrow $50 from the broker to buy a share. Typically, how far can the ...
3
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4answers
3k views

How to calculate money needed for a retirement based on an hypothetical death date & expenses?

I would like to know what formula or tool I need to use to calculate the capital needed for a hypothetical retirement that will start at date X and end at date Y. Here is an example: Variable1 = ...
1
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2answers
413 views

Suppose earning an APR of 7% for 5 years, with interest compounded quarterly. What is the EAR? What is the Total Return?

Suppose you earn an APR of 7% for 5 years, with interest compounded quarterly. What is your EAR? What is your Total Return? The part I am confused is "with interest compounded quarterly" The ...
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2answers
1k views

Calculating accumulated value of an annuity with changing payments?

In a series of 40 payments the first 10 payments are 10 each, the second 10 payments are 20 each, the third 10 payments are 30 each, and the final 10 payments are 40 each. The payments are equally ...
3
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2answers
333 views

Need a formula to determine monthly payments received at time t if I'm reinvesting my returns

I need a formula for how much money I will be receiving monthly and how much I will have in total for any time t (in months). The following is my scenario: I will be investing $900 monthly into a 3 ...
2
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1answer
88 views

When performing wash sale calculations does time of day matter?

For wash sales, I've read there is a 30-day window both before and after an opening trade during which a loss from a closing trade becomes a wash sale with respect to the opening trade's cost basis ...
3
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3answers
447 views

I'm a programmer and need a formula for calculating overal ROI [duplicate]

I'm programming a web app to track my hedge fund performance. I'd like to find my overall ROI for all time. If I had a beginning balance and my current balance then finding the ROI is easy. For ...
3
votes
1answer
433 views

IRS returns more money than my calculation - how can I find out where I was wrong?

A couple of months ago I filed the 2012 tax returns. I was expecting a few thousands USD for a refund. Finally, the payment was received in my bank account, and I noticed that the actual refund was ...
4
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4answers
30k views

What's the formula to calculate the monthly or lump-sum investment amount for a desired future value?

Give the following values: Inflation Rate 2% Expected Return Rate 5% Future Value 1,000,000 monetary units Years to Target - 10 What is the formula to calculate the amount of? Lumpsum investment ...
1
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2answers
279 views

Why is that we discount all the coupons and par amount of a bond at the same rate?

Why is that we discount all the coupons and par amount of a bond at the same rate, our YTM? If we think of each coupon/par as a strip/single bond on its own, wouldn't then each coupon payment be ...
4
votes
4answers
24k views

Is there a mathematical formula to determine a stock's price at a given time?

I have been trying to find exact information on how stock prices are determined but still I haven't found any exact mathematical formulas how it happens. Wikipedia states: When prospective buyers ...
2
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2answers
158 views

Calculating the cost of waiting longer for money

I'm trying to calculate the cost of waiting 30 extra days to receive money from a customer. Here's the situation: How much would this cost a company per year if a customer pays us in 60 days vs. 30 ...
9
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2answers
928 views

How does compounding of annual interest work?

I have tried reading up on it, but I just find it confusing. Apparently, if you started investing $150/month at a 15% annual return and kept reinvesting the profits, here is what you would have ...
1
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2answers
3k views

How to determine duration of a common stock whose dividends grow in perpetuity?

What is the duration of a common stock whose dividends are expected to grow at a constant rate in perpetuity? Specifically, how can I compute this, since the dividends will grow forever? Update: Ok, ...
1
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1answer
148 views

What is the formula for the Tesla Finance calculation?

According to http://www.teslamotors.com/true-cost-of-ownership with the fields set to a rate of 3.3%, down payment 10% over a 72 month term, it calculates this to be $980/mo. How did they get there? ...
4
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1answer
6k views

Calculating the profit earned from a leveraged futures contract

How do we calculate the profit/loss of Futures contract? For example, If I had a Futures contract that had $10 000 as the underlying, it had $1000 margin and the Futures contract itself was worth $3. ...
7
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2answers
610 views

Correct calculation for determining real business book value per share?

I'm trying to calculate the real value of a business and, as an example, I picked Netflix. From their latest financial statements I can see that: Assets value is: $3,065,709,000 Liabilities value ...
3
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2answers
236 views

Method for calculating the wisest amount of liability to purchase for car & home insurance?

I've seen the advice to get enough liability insurance as you have in total assets, i.e. if your owned home, owned car & savings = $100,000, then get $100,000 liability coverage. What is the ...
1
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1answer
277 views

Calculating required rate of return for an income-generating savings account

Say someone has £1m. They want it to generate an increasing level of income, starting from £25k in year 1, and increasing at a rate 7% + inflation pa, such that the end value of the savings after 20 ...
5
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2answers
22k views

How to calculate total interest paid on a decreasing balance?

I am trying to come up with the equation which will give me the total interest to be paid on something given a fixed interest rate with a fixed payment for a given period of time. The interest is ...
0
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1answer
1k views

How do I calculate sales tax to many items? [duplicate]

I'm wondering how to calculate sales tax when this situation. Item price is 14.97 and quantity is 7. Sales tax is 9%. 14.97 * 7 * 0.09 = 9.4311 = 9.43 14.97 * 0.09 = 1.3473, rounding up: 1.35 * 7 = ...
3
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3answers
2k views

What is the optimal way to calculate tax: apply tax to each item, then sum the prices, or sum the prices, then apply tax? When are prices rounded?

What is the optimal way to calculate tax? Lets say tax is 7.5% or 0.075. $2.32 X 1.075 = 2.494 --> Rounded: $2.50 You can say that item is $2.50 (tax included) and if you have two items: $2.32 ...
2
votes
1answer
430 views

How do I calculate the interest on my deposits to my landlord?

I was renting from this company called harbor house builders. I started renting from them in 2009 and at that time I was renting an apartment at 650 a month so I put 650 for rent and 650 for deposit. ...
9
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5answers
2k views

For net worth, should I value physical property at my cost to replace it, or the amount I could get for selling it?

I recently was a good little consumer and picked up a relatively expensive set of new home furnishings, some furniture, a TV, some other electronics ... items of that nature (don't worry, been ...
1
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1answer
2k views

How do I calculate the total return on a bond series given its yields?

How do I calculate the total return on a bond series given its yields? Is there an equation? I looked at this Investopedia article, but it only refers to stocks in general.
4
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2answers
1k views

How does the Dow Jones Industrial Average (DJIA) divisor change to account for dividends?

The DJIA is a price-weighted index tracking of 30 companies chosen by the Dow Jones Company. It takes the current share price of these 30 stocks and divides by a specific number called the divisor. ...
3
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3answers
514 views

What is the theory behind Rick Van Ness's risk calculation in the video about diversification?

In the video, Rick Van Ness states the following scenario: Stock A has a 7% return with +/- 1% risk Stock B has a 3.5% return with +/- 0.5% risk Stock A and B are perfectly negatively correlated. A ...
2
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2answers
6k views

How to calculate dividend yield for the Dow Jones Industrial Average (DJIA) index?

This should be fairly straightforward. How do I calculate the dividend yield myself for the Dow 30 / Dow Jones Industrial Average (DJIA)? I'm thinking I just add the last dividend for all the ...
5
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2answers
2k views

Discussing real estate appreciation: Compound vs. simple interest?

When people say real estate has appreciated 8 % over the past 5 years, do they mean 8 % compounded annually? or simple interest annually?
5
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1answer
475 views

Comparing pre-tax versus post-tax health expenses?

I understand the concepts from this question and everything I have read says that the benefit of pre-tax expenses are that they reduce your taxable income. But to keep the math simple, let's say ...
3
votes
2answers
4k views

Calculating Profit Ratio (Gross Margin)

When looking at a company's income statement to calculate the Profit Ratio (Gross Margin) PM = Net Profit / Sales Do you include "other" revenue in the equation? Example: XYZ Ltd Income Statement ...
9
votes
3answers
19k views

How do you do inflation calculations and estimates?

I'm an engineer, not an accountant so I have no idea what formulas to use (or even the proper terms to google for). I've looked around on a couple of google results, but most of the explanations just ...
2
votes
2answers
2k views

What is the effective interest rate on a credit card that offers 0% interest with a 4% balance transfer fee?

I'm about to do a balance transfer that has a fee of 4%. It gives me 0% interest for 14 months. Is it just a straight calculation of 4% for the year or is there another calculation that I need to ...
6
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3answers
1k views

Dealing with fractions of a penny

If my car insurance was £1200.01 per year, I could end up being charged £100 + 1/12p per month. I know that's not how it works, the extra penny is kept whole and goes on a specific month instead. ...
3
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3answers
513 views

Rules of thumb for present value of retirement funds given current age and income?

I know the general rule of thumb is you should save 15% of income to retirement, but I'm playing catch-up after years of neglect and contributing 25% until I catch up again. But how will I know when I'...
4
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1answer
3k views

What does the “SEC 30-Day Yield” mean for a Bond ETF?

I'm currently a student awaiting admission into grad school and have about $10,000 in a Scott Trade account ready to invest. Because I'll be using the money to pay for moving expenses and anything ...
1
vote
2answers
402 views

Having trouble with APR calculation

I am using the formula listed on the following site to try to calculate APR: http://www.fdic.gov/regulations/laws/rules/6500-1950.html#fdic6500appendixjtopart226 go to appendix J, if it doesn't auto ...
8
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2answers
266 views

Help understanding credit card interest

I have a credit card with an outstanding balance and I am trying to work out when I will complete paying it off. It is a UK credit card (where I am based) and I do not spend on it. I pay 150 per ...
4
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1answer
969 views

How to determine the interest rate?

I'm really not good at math. So please forgive me for this noob question that I have.. Just trying to learn basic percentage calculation with money lending.. Here's an example of how the APR works. ...
3
votes
2answers
10k views

Formula for calculating real cost of a deductible expense

Nice round numbers: say I perform a job that gets $1000 gross (call this g) in which I incur $100 in expense (call this e). The expense is fully deductible. Assume my marginal tax rate is 25% (call ...
3
votes
2answers
623 views

How are minimum payments calculated for auto loans, education loans, etc.

I'm working on a calculator and I have a good handle on Mortgages (amortization) and Credit Cards (daily average, apr, multiply between 3-5%), but I'm not sure how to calculate minimum payments for ...
-1
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1answer
265 views

fixed income calculator

where can I find a fixed income investment calculator? How much income can I expect monthly if I try to live off the interest alone? Are there any penalties for switching investment strategies?
1
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1answer
589 views

Calculate APR for under 1 year loan

I was talking with a friend about Payday loans (neither of us is getting one, just merely curious) and the APRs they state aren't really true. So, I was trying to figure out an APR based on the ...
2
votes
1answer
1k views

How to calculate lump sum required to generate desired monthly income?

Suppose my monthly expenses are $500. I want to ask a charity foundation to finance my scientific research by one-time payment intended to cover all my monthly expenses during my lifetime. How to ...