QUOTE(Andrew_1980 @ Nov 25 2016, 03:33 PM)
I knew that calculation is base on Calendar days (365 or 366)
So I use this website to calculate how much interest I will got when matured
http://www.miniwebtool.com/fixed-deposit-calculatorBasically I will put 1 month tenure, feel safe as I not sure will I need money next month? But seems GIA is flexible, I might put longer tenure. But now I haven't open MBB saving account yet.
The miniwebtool calculator for fixed deposit is great for normal rough calculation of what to expect. It is based on the normal kind of arithmetic we learn in school and what you can expect from a financial calculator or a normal financial spreadsheet.
Various forum posters had posted about calculated results being different. One person even asked how come predicted/knew it will be 1 sen less from the calculation. Actually a lot more sens and even dollars off had being experienced. The simple explanation is that the calculation and results depends on the bank's program treatment of what is a bank day (or part off to give for some really not so generous banks), the divisor, and how they treat payments made or payments due, and when creditted/withdrawn.
Unfortunately, different banks have different ideas/policies/implementations - or maybe they do not really know what their different programmers and programs are up to actually in the nitty gritty level where things are usually different in many ways as each step is done although results are expected. Most times the banks do not like to lose/pay more generously, but also want to avoid what can be considered outright cheating or extra charges.
We cannot have access to what programs are used and study the quality of the documentation and the program modifications. Most likely, even the bank staff/experts are not really aware what their software vendor has done in real detail trying to comply in their own peculiar ways to the requirements or updates.
However, we can reverse engineer/compute various approaches/scenarios to come to a close approximation or eventually to an exact prediction that matches every time for a particular bank/product.
Just for illustration only:-
Principal 100,000 for 366 days at 1% using simple interest for an FD. What is the result and what do you think you will get at Hong Leong and Maybank. Let us not complicate matters by mentioning other banks at all. Try to explain the results. If you use the miniwebtool, the interest is 1002.74.
If you want to check with a 12 digit calculator, it is 1002.73972602. If you understand the question, and its implications, you will have learnt something basically useful such as questioning your instruments, programs or validity of what is done. If you think the answer is so simple, you can get a distinction in school where things are simplified, but life is not so simple after experience.