# Questions tagged [finance]

Finance is for anything related to currency, payment systems, credit card number validation, etc.

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73 views

### Parse the weekly menus of a German delivery service

I am a C# beginner, and I wrote a program that parses the weekly menu of a German delivery service. It works fine and I think the code quality is okay. Can anyone with more experience than me review ...
56 views

### Heston model implementation in C++

I have implemented an option pricing algorithm following the Heston model. The simulation involves specifying the number of simulations, then generating a discretized path for each simulation (code ...
• 23
656 views

### Calculating Discount C++

The following question is from the book Problem Solving With C++. This is given as an exercise in the chapter "Functions for all subtasks": Write a function that calculates a discount ...
1 vote
98 views

### Refactoring legacy java banking code

Hey i have some legacy code i'm working on (It is open source so no problem in me sharing it!). I wanted to refactor some parts in the extractResult method since it ...
135 views

### C++ bond mathematics calculator

I have written a program in C++ that processes financial bond mathematics, making extensive use of the valarray class, so that mathematical functions and operations ...
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471 views

### Simple credit card validation with Luhn's Algorithm

Originally written in C (which was abysmal, you may check here if you want), I rewrote my simple credit card validation program using Python ...
1 vote
38 views

### quant. code. to calculate trend, momentum, correlation and volatility in Pandas(Python)

I am new to quant. finance and trying to calculate trend, momentum, correlation and ...
46 views

### Compute a Working Capital Loan

This code takes a list of EBITDA amounts (for a hypothetical business), and computes a loan that would fund that business with working capital in periods of loss. When the business has positive EBITDA ...
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1 vote
216 views

### A Credit Payment Calculator

So I've attempted this project from hyperskills where you're asked to make a calculator script that can calculate annuity and differentiated payments given that 3 of 4 values are known. I think i went ...
• 1,180
133 views

### Model profit/loss of a time series of financial position state changes

I'm newly exploring time series databases, and trying to wrap my head around what data I'll store and how I'll query it. Also, I'm relatively new to TypeScript. This prototype exercises my current ...
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51 views

### Analyze Stock Market Bottom Timing without Looping over Data Frame Rows

I am replicating this blog post in Python. The blog post shows that even if you know future stock market bottoms, only buying stocks when the stock market is below future stock market bottoms provides ...
45 views

### Calculate quote volumes (for a financial instrument) within numeric constraints

The function below is part of a trading system. Its purpose is to assign a volume (order size) to a bid (buy) quote and and ask (sell) quote, depending on the value of the ...
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46 views

### Get Asset Returns for multiple Tickers and Holding Periods

I've written some code that will take multiple stock tickers and calculate their returns over yearly, monthly, bi-weekly, and weekly holding periods. The results are written to an xlsx file. I'm ...
1k views

### Calculating the necessary contribution to attain a savings goal with compound interest

This is a problem set from the MIT online course : Suppose you want to set a particular goal, e.g. to be able to afford the down payment in three years. How much should you save each month to ...
• 602
2k views

### Pulling financial data via IEX Cloud API

I am pulling some financial data from the IEX Cloud API. Since it is a paid API w/ rate limits, I would like to do this as efficiently as possible (i.e., as few calls as possible). Given that the <...
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15k views

### Income tax calculator [closed]

I've just started coding and have written a program to calculate your tax to be paid. Is there anywhere where I can improve this? ...
• 81
1 vote
42 views

### Return timeframes relevant to just-elapsed time period (financial/trading context)

I am writing trading software, and have written this utility function. Its purpose is to return a list of timeframes relevant to the just-elapsed time period. "Timeframe" here means bar or candle ...
• 83
274 views

### Asynchronous IBAN API with validation

I am working on an iban api which is about saving the iban of some members after (iban validation) in a database. The code is split between Domain (entities, behaviour for iban validation), Database ...
• 1,101
96 views

### Simple income/expenses accounting program

I've decided to start working on a budget application for the purposes of getting started on Rust. In its current form this program takes given expenses and income and tells the user whether they have ...
490 views

### Python maintain precision for currency

Working with currencies I am aware it is not good to work with floating point values due to rounding and maintaining precision. Better is to work with integers. Would the following Currency class make ...
916 views

### Loan repayment calculator

I am having some trouble figuring out how to modularize this code without rewriting it entirely. I know I should be able to break it up into modules for main, gathering info, doing calculation and the ...
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1 vote
177 views

### Simple calculation of sector coefficients using PHP

Function This class extends the key class, called EQ, and does basic calculation based on minutely data. It then calculates weight coefficients (e.g., [0, 1]) for ...
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70 views

### Mortgage calculator with Swing for Helsinki MOOC

New to Java, just finished the Helsinki MOOC course. I programmed a basic mortgage calculator as my first solo project and while it works, I have a few questions about coding style: The listener and ...
461 views

### Tracking stock prices using Python and Google Sheets

The purpose of this program is to keep track of some stocks that we bought in a game and every week we must list the closing prices of each stock in a Google Sheet. I thought since I had a lot of ...
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4k views

### OOP bank account program in Python 3

Python beginner here. Building an OOP bank account program with SQLite and starting to struggle a bit with its design. From a design standpoint I have a file (bank) which calls ATM. ATM simulates an ...
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3k views

### Loan calculator in C

I wanted to create a loan calculator, but the code I could think of was using 3 functions, and calling them and getting result. But I felt it was easy but bad code because I thought this can be ...
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804 views

### Predicting credit card default

I have this code for predicting credit card default and it works perfectly, but I am checking here to see if anybody could make it more efficient or compact. It is pretty long though, but please bear ...
1 vote
222 views

### Python 'Cashflow' object

In the code shown below, I have created 3 classes. The first of these are an 'Payment' class and a 'Annuity' class, which allow the user to create objects representing individual or recurring payments ...
• 115
242 views

### Python 'interest rate' object

I have only recently started learning python and the below is my attempt to create an 'interest rate' object which, given one of several types of interest/discount rate, gives the user access to all ...
• 115
1 vote
171 views

### Renting vs. owning comparison calculation

I have working code that compares rental prices and owning costs, given some parameters. It works, but it surely does not look good. I hadn't worked with time-series before and I wonder how I could ...
• 133
65 views

### The importance of consistency in percentage returns when investing

It is said that Being consistent in percentage annual returns leads to larger amount over time. That is for any given principal, getting 20% successively for 2 years is better than 30% for first ...
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860 views

### Compound interest calculator homework [closed]

I am a beginner at coding Java and am having a tough time understanding what is wrong with this code. This is an assignment I had posted about earlier and I also went to a Java tutor at my school for ...
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1k views

### Reversible tax calculator class

I have a class that contains 2 properties of the same type. decimal NetAmount and decimal GrossAmount I would like to ...
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3k views

### JavaScript interest rate calculator

As I am still new to web development, refactoring my code is still something that gives me some trouble. I would really appreciate it if someone could look over the Javascript for an interest rate ...
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836 views

### Profit Margin Calculator in Python (with installments)

I was sent here from StackOverflow to get some insight on how I can improve my code. I'm a beginner and the program is not streamlined at all. What the program does: Takes an input of the Retail ...
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845 views

### Calculate implied volatility for options on stocks and futures with two models

I wrote a code for a quant finance job and they told me that, besides it worked, it was poorly written. I asked for a more detailed feedback but they did not send it to me. I paste it here with ...
• 165
172 views

### Kids bank account in Clojure

I'm learning clojure. A while back I made a python bank account for my kids, teaching them to save. Have a look here. The Python one was a class and it created a table that had a little interest ...
• 183
2k views

### Bank Management System

I'm new to C++ and wrote this Bank Management System app. It's one of the projects that everyone does as a beginner. This app runs perfectly so far. I tried to use OOP and encapsulation in this app. ...
• 478
1 vote
187 views

### Currency exchange app

I'm making a currency exchange app, it works as follows: User types in on desired currency input and the rest of the input fields change with state based on the currency value from the input used, I'...
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3k views

### A little stock market game in Python

This is a stock market game I made in Python a while ago, and I wanted to go ahead and share it on here. If you are wondering, the reason why there is only 2 stocks is due to the fact that creating a ...
• 349
2k views

### Bank saving account class in Python (pandas)

I am setting up a kids bank account class to teach them how to save, and myself how to write a class in Python. The original idea was to create a pandas DataFrame that will show how the money gains ...
• 183
92 views

### Computing most-cost effective loans in financial graphs using Java

Problem statement We are given a directed graph $G = (V, A)$, where $V$ is the set of actors and $A \subseteq V^2$ is the set of directed arcs. Existence of an arc $(u, v) \in A$ is ...
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94 views

### Investment tracker allowing users to store investment information and later access it

This investment tracker allows users to store investment information and later call upon it. This is a simple solution to making investing easier to maintain. This application has a simple login ...
4k views

### Financial website scraper

I wrote the code that would scrape Finviz for tickers and href that attach to the ticker. I tested with multi-page as well as one page. I'm new to Python ...
4k views

### Expense Tracker for keeping track of payment information

This system is an expense tracker. It allows ordinary people to track expenses, like bills, car notes, and keep up with the payments they make. I had this idea after my father and mother began to mess ...
5k views

### Banking application for practice

A few weeks ago I have started to teach myself C# and just finished my first little project, a very basic banking application. I don't expect it to be good but would like to get feedback (no matter ...
• 81
15k views

### OOP ATM application

As part of my studies, I need to gather peer feedback as part of my object-oriented ATM application. I have only used classes (inheritance etc.) and no GUI is required for this. Could you please give ...
• 33
4k views

### Calculate EMI based on principal, rate, duration (month or years)

I am trying to create an EMI calculator for a loan. The problem description is: Given a principal amount, rate of interest, monthly or quarterly installment terms and duration of loan in months/years ...
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