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.

learn more… | top users | synonyms

4
votes
1answer
1k 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 ...
2
votes
3answers
414 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 ...
6
votes
2answers
195 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
votes
1answer
413 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 ...
1
vote
2answers
295 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 ...
2
votes
4answers
8k 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 ...
3
votes
2answers
440 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 ...
3
votes
2answers
4k views

What is the equation for an inflation adjusted annuity held in perpetuity?

What is the equation relating an initial investment, a fixed rate of return, an inflation rate, and a perpetual payment adjusted for that inflation rate?
-1
votes
1answer
162 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
vote
1answer
184 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 ...
1
vote
1answer
582 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 ...
4
votes
2answers
380 views

Formula to decide when to break a Certificate of Deposit (CD)?

I'm trying to create a certificate of deposit (CD) comparison tool and have been working on a formula to compare a CD with a higher interest rate to a CD I might own with a penalty period. I believe ...
2
votes
4answers
2k 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 = ...
2
votes
1answer
151 views

How to calculate outstanding Graduate Plus Loan balance currently in deferment?

Can someone tell me what I'm doing wrong here? If I have a $56,500 loan and the interest rate is 7.9% how much will I owe after 8 months? I thought this would be fairly simple. I would ...
3
votes
3answers
9k views

How to calculate stock price (value) based on given values for equity and debt?

If a company has $80 million in equity and $20 million in debt, this means that total firm value = D + E = $100 million. Am I then right to assume that if there are 1 million shares outstanding, then ...
7
votes
5answers
42k 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: ...
4
votes
2answers
759 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. ...
7
votes
3answers
2k views

Is interest of credit cards caculated based on the amount unpaid within the grace period?

From Wikipedia if a user had a $1,000 transaction and repaid it in full within this grace period, there would be no interest charged. If, however, even $1.00 of the total amount remained ...
0
votes
2answers
415 views

Formula for recalculation of a bad loan, i.e. where payments were missed?

I need to know if exists any formula to calculate interest rate, principal interest, total amount to be paid, in the case of a bad loan. Ex: In a bank exists a 20 year home - loan. The client was ...
2
votes
3answers
3k views

How is interest in my bank account calculated?

I am a software professional. I have one question. How do banks calculate interest on money deposited, if I get, say, 10 % per annum? Say I deposit say RS.1000 on the 1st day of the month; then I ...
-1
votes
1answer
234 views

What's the Effective Interest formula used by this loan calculator?

I used a loan calculator which gives an effective rate of 80.781 whereas wikipedia http://en.wikipedia.org/wiki/Annual_percentage_rate gives a rate of 49% for these parameters: borrowed: 100 fees: ...
10
votes
2answers
23k views

How to determine contractor hourly rate and employee salary equivalents?

I am aware of the general differences between being an employee and being an independent contractor. However, I am unable to easily compare the two when it comes to after-tax compensation. Company ...
0
votes
2answers
1k views

How much is my annuity worth? Calculating present (commuted) value of an annuity or pension?

I have a lifetime annuity which adjusts with cost of living increases in my state. Is it possible to compute the present value of this annuity? If so, how might I go about that? Perhaps I am ...
4
votes
1answer
66 views

Should you work out the yield on property or shares against the purchase price, or the current market price?

In What is a good rental yield?, there's some discussion about whether you should calculate yield by dividing the original purchase price, or the current market price. Which is the correct ...
7
votes
2answers
399 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 ...
4
votes
2answers
3k views

How is my 'Personal Investment Performance' on my 401(k) calculated?

My 401(k) shows the following: my starting value at the beginning of the year personal contributions employer contributions investment gains/losses Closing value from Yesterday Total Change ...
4
votes
1answer
2k views

How can I calculate a “running” return using XIRR in a spreadsheet?

I should say that I'm not married to XIRR, I just want to calculate the return on a running basis in a column next to dates, deposits and balances. Here's a screenshot of a simplified spreadsheet in ...
9
votes
3answers
2k views

Buying a more expensive house as a tax shelter (larger interest deduction)?

I've heard that some people buy a more expensive house as a tax shelter. In my simple mind I imaging the scenario: Pay 10,000 annual interest on the mortgage 50,000 annual income = 40,000 ...
1
vote
2answers
2k 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: ...
2
votes
6answers
2k views

Help me understand the oddity of percentage gains and losses?

If you start with $100K, and you get a 50% gain, it's $150K. Then, you get a 50% loss: now it's $75K. Reverse the order (i.e. lose 50%, gain 50%), it's the same thing (a 25% loss). So, 50% up then ...
0
votes
1answer
30 views

Understanding company pension plan monthly purchase of funds

A pension based on funds. What does it mean to add £500 a month to a pension based on funds? Does that mean, I will own an additional £500 worth of that fund each month based on how much of the fund ...
2
votes
2answers
111 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. ...
5
votes
2answers
561 views

Is there a dollar amount that, when adding Massachusetts Sales Tax, precisely equals $200?

I am confused about calculating Massachusetts Sales Tax (6.25%). Is there such an amount, that when added to its sales tax, equals $200? The reason I ask is because my business has been charging ...
0
votes
2answers
163 views

How many stocks will I own in n years if I reinvest my dividends?

Let's say that I own 1000 shares of a stock at 20$. Every quarter, I get a dividend of 0.20$ which is reinvested (buy more of the same stock). Considering that the stock grows 5% annually, how many ...
9
votes
5answers
887 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 ...
5
votes
2answers
618 views

Calculating savings from mortgage interest deduction vs. standard deduction?

I've read just about anything I can find on comparing cash-flow between owning a house versus renting. One new thing popped into my head yesterday, and I can't shake the feeling that it's an obvious ...
12
votes
2answers
15k views

Daily interest calculation combined with monthly compounding: Why do banks do this, and how-to in Excel?

I often see banks advertise (for accounts with fixed yearly interest, let's say 1.5%) – "interested is calculated daily, and compounded monthly". I have 2 questions: Why are they calculating ...
8
votes
2answers
262 views

How do I account for newly added money when computing my rate of return?

I have a simple spreadsheet where I track the balance in my investment account. What should I do to handle new deposits in the account? For example: End of Day 1: balance = $100 End of Day 2: ...
2
votes
1answer
278 views

What does “average revenue growth” over multiple periods of time mean?

In particular, given 10 years of revenue data, what is "average revenue growth" understood to mean? The arithmetic average of the 9 yearly growth rates The geometric rate of return Something else No ...
9
votes
2answers
436 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 ...
3
votes
2answers
12k views

How do I calculate yield-to-maturity (YTM) with a simple handheld calculator?

Is there a way to calculate yield-to-maturity (YTM) using just the payments (not all equal) with just a simple handheld calculator and without using Excel?
1
vote
4answers
1k views

How do I calculate a simple moving average for stock prices?

To give a little context, this is for a programming assignment at school so the simplest form of proper moving average is all that's needed. I've searched around and seen the summation formulas and ...
5
votes
2answers
3k views

How to translate old price amounts to their modern day equivalents?

I hope this is the right place to ask. :) I'm currently working on what is to be a wiki/encyclopedic website. Some articles contain amounts or prices like construction costs and such, but since these ...
3
votes
3answers
738 views

Does financing a portfolio on margin affect the variance of a portfolio?

For example, if the portfolio is financed with 50% margin, does it affect the portfolio variance?
1
vote
1answer
1k views

What's the beta of U.S. treasury bills?

Is it zero? My reference equation is: Bi = σim / σm2 Is the top sigma of im considered to be zero, since treasury bills have a fixed payout? If not, how do you suggest ...
8
votes
1answer
682 views

Calculate Income Tax amount of UK Salary

I've recently been trying to calculate different take home amounts from different salaries, and have ended up getting confused over how the different tax brackets work. If I try to calculate the ...
12
votes
11answers
2k views

Should I pay off the credit cards now or do the monthly payments thing?

I have 3 credit cards with a total balance of about $36k. Two of the cards are at 2% and the last one is at 0%. With the current payment structure, I'll be debt free in 25 months. I recently came ...
2
votes
3answers
1k views

Discussing stock and stock index movement: clarifying percentage vs. points?

I'm trying to understand more about financial terminology used in news reports, but I'm having a hard time understanding what is meant when someone says the following: "NASDAQ was down X points today ...
4
votes
2answers
572 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
votes
2answers
527 views

How to calculate the market capitalization (fair market value) of the Metropolitan Transportation Authority of New York?

I'd like to calculate the fair market capitalization of the Metropolitan Transportation Authority of New York, or learn how to do so of any comparable public interest corporation (ie an entity without ...