Tagged Questions

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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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
1k 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
1k 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
400 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
152 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
662 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
443 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
10k 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
215 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
245 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
343 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 ...
2
votes
2answers
7k 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
739 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
2k 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
581 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
985 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
572 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 ...
4
votes
0answers
175 views

How to file/calculate a plain Net Operating Loss (NOL)? [closed]

Does anyone have a clear set of instructions for filling a plain vanilla NOL? It seems awfully complicated. Is using the actual loss sufficient for the IRS?
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
874 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
410 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
488 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 ...
2
votes
1answer
614 views

How is the adjusted family net income calculated for the Ontario Sales Tax Transition Benefit (OSTTB)? What is included in that adjustment?

How is the adjusted family net income calculated for the Ontario Sales Tax Transition Benefit (OSTTB)? What is included in that adjustment?
2
votes
1answer
143 views

How to arrive at the fee-adjusted APR (accounting for balance transfer fee, but not inflation)?

I'm trying to figure out the fee-adjusted interest rate paid when incurring a balance transfer fee on a loan, not accounting for inflation. If the APR is 4%, the loan 5000, the transfer 2% and you ...
4
votes
2answers
271 views

Calculating the most optimal way to pay off credit cards

I have 3 credit cards which I am slowly paying them off. Card# Balance Monthly Interest Months to pay of Minimum Payment at current rate Payment 1 ...
5
votes
2answers
7k 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 ...
2
votes
4answers
2k views

How can I calculate how much tax I will pay

I'm a consultant thinking of taking a full time salary job. I live in WA state and have a family. How can I calculate how much tax (federal, social security, medicare) I will pay? I've used ...
2
votes
2answers
214 views

How is the 6th year on a 5/1 ARM calculated?

Given a 5/1 ARM for a $350,000 loan at a rate of 2.875%: After 5 years of paying at 2.875%, let's say the balance is $310,000. On the 6th year, the first adjustment kicks in an kicks the rate up 1% ...
8
votes
2answers
869 views

Credit card interest calculator with grace period & different interest rate calculation methods?

Is there an (ideally online) credit card interest calculator that includes grace periods and lets you choose the interest calculation method (eg, "adjusted balance", "average daily balance", ...
4
votes
2answers
1k views

How to calculate incremental interest rate for home refinancing?

Summary: When you refinance your house and borrow more money, how to calculate the incremental interest rate you pay? I currently owe $95K on my house, 4.75% interest rate, $510 monthly payment ...
4
votes
4answers
2k views

How to calculate credit card interest with respect to grace period transactions?

If my credit card currently has a $0 balance, and I make a transaction and pay it back within 25 days, I won't pay any interest, even if I had a balance and was paying interest previously. Is that ...
9
votes
7answers
397 views

What single metric is the ultimate measure of personal wealth?

More specifically, what is the single metric you would use to monitor personal wealth?
3
votes
1answer
404 views

Calculating fair value of an oanda.com box option

How do I calculate the theoretical "fair value" of an oanda.com box option? More specifically, how do I calculate the probability that a given FOREX parity will enter a given range in a given period ...
6
votes
5answers
4k views

Why do mortgage affordability recommendations use gross income?

Whenever I see someone ask how to calculate how big a mortgage he can afford, the answer almost always comes back as a percentage of gross income. Why use gross income as the baseline? Why not net ...
2
votes
2answers
1k 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 ...
4
votes
1answer
163 views

If you owe tax, how does the IRS failure-to-file penalty work?

If you owe tax, how does the IRS failure-to-file penalty work?
3
votes
3answers
2k views

How to calculate the rate of return on selling a stock?

How to calculate the rate of return on selling a stock?
8
votes
3answers
852 views

How to determine new, lower interest payments after a lump sum mortgage payment, i.e. new amortization schedule?

Here's a financial math problem: I have a mortgage at about $78,0000 with 5.5% interest and 56 of 360 monthly payments were made. I'm currently paying about $360/month in interest charges. If I pay ...