Determining amount of inflation between two dates
You want percent change between the two numbers listed under whatever heading you'll be using in the CPI. As an example, you'd probably want to use the All Items heading listed here on Page 4 of the August 2016 CPI tables as 240.853, and from August 2015 was listed as 238.316.  Percent change is  So 1.06% inflation from August 2015 to August 2016.
"All of the other answers here are accurate, but (I think) are missing the point as to the question, which rests on how Bonds work in the first place. The bond specifies a payback AMOUNT and DATE. Let's say it is $10,000 and one year from today. If you buy that today for $9900, your yield will be 1%. If you buy it today for $11,000, your yield will be less than 0% (please don't make me do the math - it's just under negative 1%). You might be willing to pay that 1% (rather than receive 1%) for the certainty that you will definitely get your money back. The combined actions of all the people who may be willing to pay a little more or a little less for the safety of a US Treasury Bond is what people call ""the Market.""  Market forces (generally, investor confidence) will drive the price up and down, which affects the yield. All the other stuff - coupons and inflation and whatnot - all of that only makes sense if you understand that you aren't buying a rate of return, you are buying a payback amount and date." Maryland is one of only two states (as of the writing of that article) that collects both inheritance tax and estate tax. These are two different issues, and it's important to differentiate between them sufficiently. I can't provide you a definitive answer, so consult a tax professional in Maryland for specific details to make sure you don't run afoul of tax authorities. This blog has a nice summary of the differences, as of 2012: The estate tax is assessable if more than one million dollars passes at death.  The total dollar value of the property determines whether there is an estate tax.  The inheritance tax is not dependent upon the value of the estate, as even very small estates can have inheritance tax imposed.  Inheritance tax is assessed on property given to a person who is further removed in relationship than a sibling.  Thus, for example, a 10% tax will be assessed on property passing to a cousin, niece, nephew or friend.  Another section of the page states, as an example: If you give someone $10,000 in cash, the inheritance tax will simply reduce the amount inherited – in this case to $9,000. There are several other exemptions to the inheritance tax in addition to the immediate family exception discussed above: Property that passes from a decedent to or for the use of a grandparent, parent, spouse, child or other lineal descendant, spouse of a child or other lineal descendant, stepparent, stepchild, brother or sister of the decedent, or a corporation if all of its stockholders consist of the surviving spouse, parents, stepparents, stepchildren, brothers, sisters, and lineal descendants of the decedent and spouses of the lineal descendants. Putting this information together makes me think that the inheritance wouldn't be taxable in your case because it's a cash inheritance from an immediate family member, so it qualifies for one of the exemptions. Since I'm not a tax professional, however, I can't say that for sure. Hopefully these pages will give you enough of a foundation for when you talk to a professional. There are two basic kinds of derivatives - forward contracts and options.   A forward is an agreement between two parties for one party to buy/sell some asset to the other at a price that they agree upon today at some date in the future. An option is an agreement that gives one party the right, but not the obligation, to buy/sell the asset at some date in the future.  Most derivatives that exist are a combination of these two things. For instance, a futures contract is a standardized forward contract that is traded on an exchange, and a swap is a portfolio (or chain) of forward contracts linked together. American/Bermudan options are just options that allow you to exercise on more than one day. "I wrote a little program one time to try to do this.  I think I wrote it in Python or something. The idea was to have a list of ""projected expenses"" where each one would have things like the amount, the date of the next transaction, the frequency of the transaction, and so on.  The program would then simulate time, determining when the next transaction would be, updating balances, and so on.  You can actually do a very similar thing with a spreadsheet where you basically have a list of expenses that you manually paste in for each month in advance.  Simply keep a running balance of each row, and make sure you don't forget any transactions that should be happening. This works great for fixed expenses, or expenses that you know how much they are going to be for the next month.  If you don't know, you can estimate, for instance you can make an educated guess at how much your electric bill will be the next month (if you haven't gotten the bill yet) and you can estimate how much you will spend on fuel based on reviewing previous months and some idea of whether your usage will differ in the next month.  For variable expenses I would always err on the side of a larger amount than I expected to spend.  It isn't going to be possible to budget to the exact penny unless you lead a very simple life, but the extra you allocate is important to cushion unexpected and unavoidable overruns. Once you have this done for expenses against your bank account, you can see what your ""low water mark"" is for the month, or whatever time period you project out to.  If this is above your minimum, then you can see how much you can safely allocate to, e.g. paying off debt.  Throwing a credit card into the mix can make things a bit more predictable in the current month, especially for unpredictable amounts, but it is a bit more complicated as now you have a second account that you have to track that has to get deducted from your first account when it becomes due in the following month.  I am assuming a typical card where you have something like a 25 day grace period to pay without interest along with up to 30 days after the expense before the grace period starts, depending on the relationship between your cut-off date and when the actual expense occurs." There's a difference between physical currency and money (For example a bank may only hold only a small percentage of total deposits as cash that it's customers can withdraw).   I'm not sure which you're referring to, but either way you should read  about inflation. "Individual product prices do not necessarily rise at inflation rates.  What inflation means is that the purchasing power of one unit of currency decreases by x% in a year, which is typically measured by looking at a broad spectrum of products in an economy and extrapolating to ""all products"".  So for all products across an economy, the aggregate price of all goods will, on average, be X% higher that they were this time last year.  Some products will be cheaper, some will be more expensive, but on average their prices will rise with inflation rates. For the other part of your question, inflation is an annualized percentage, so an inflation rate of 12% means prices are 12% higher than they were a year ago, so if you extrapolate that linear trend, prices will rise (again, on average) 1% in a month." As pointe out by @quid, inflation figures are almost always quoted as a comparison of prices last month, and prices a year ago last month.  So 10% inflation in August means that things cost 10% more than they did in August a year ago.  This can lead to some perverse conclusions. Consider an imaginary economy where prices stay constant over years.  Annualized inflation is zero. Then something happens on January 2nd, 2018.  Some crop fails, a foreign cheap source of something becomes unavailable, whatever.  Prices rise, permanently, as more expensive sources are used. This is the only disruption to prices. Nothing else goes wrong. So, in February, 2018, the authorities find that prices in January, 2018 rose by 1% over January 2017. Inflation! Politicians pontificate, economists wring their hands, etc. In March, again, prices for February, 2018 are found to be 1% higher than for February, 2017.  More wailing... This goes on for months.  Every month, inflation (year over year) is unchanged at 1%.  Everyone has a theory as to how to stop it... Finally, in February, 2019, there's a change!  Prices in January, 2019, were the same as in January 2018.  Zero inflation!  Everyone takes credit for bringing down inflation... "Hey guys I have a quick question about a financial accounting problem although I think it's not really an ""accounting"" problem but just a bond problem.  Here it goes    GSB Corporation issued semiannual coupon bonds with a face value of $110,000 several years ago. The annual coupon rate is 8%, with two coupons due each year, six months apart. The historical market interest rate was 10% compounded semiannually when GSB Corporation issued the bonds, equal to an effective interest rate of 10.25% [= (1.05 × 1.05) – 1]. GSB Corporation accounts for these bonds using amortized cost measurement based on the historical market interest rate. The current market interest rate at the beginning of the current year on these bonds was 6% compounded semiannually, for an effective interest rate of 6.09% [= (1.03 × 1.03) – 1]. The market interest rate remained at this level throughout the current year. The bonds had a book value of $100,000 at the beginning of the current year. When the firm made the payment at the end of the first six months of the current year, the accountant debited a liability for the exact amount of cash paid. Compute the amount of interest expense on these bonds for the last six months of the life of the bonds, assuming all bonds remain outstanding until the retirement date.  My question is why would they give me the effective interest rate for both the historical and current rate?  The problem states that the firm accounts for the bond using historical interest which is 10% semiannual and the coupon payments are 4400 twice per year.  I was just wondering if I should just do the (Beginning Balance (which is 100000 in this case) x 1.05)-4400=Ending Balance so on and so forth until I get to the 110000 maturity value. I got an answer of 5474.97 and was wondering if that's the correct approach or not."