The official currency Symbol of the Flying Islands of Jasonia is the µ. It is written as follows:

Examples:  µ50      µ0.5        µ5,000
 
 

Population Level
1: If you have fewer than 10 people
2: If you have 10-30 people
3: If you have 31-60 people
4: If you have 61-100 people
5: If you have 101-200 people
6: If you have 201+ people
Activity Level
1: If you have not been updated in a month
2: If you have not been updated within 7 days
3: If you have been updated in 7 days
4: If 3, AND you have relations with at least 2 other nations
5: If 3, AND you have relations with at least 6 other nations
6: If 3, AND you have relations with at least 10 other nations
7: If 3, AND you have relations with at least 20 other nations
Economy Level
1: If you don't really have an economy and just made up a currency
2: If you have an economy, but it is small and mainly invented and has a currency
3: If your economy is non-inflationary (government taxes rather than prints more money) and has currency
4: If you have an economy with salaries for officials and/or with businesses AND 3
5: If you are willing to actually convert micronational money to gold or macronational currencies and has done so AND 4 and 3
Business Level
1: If you have no businesses
2: If you have fewer than 3 businesses
3: If you have 3-5 businesses
4: If you have 6-10 businesses
5: If you have 11-20 businesses
6: If you have 21+ businesses
Business Activity Level
Take the amount of active businesses you have and divide by 2 (An active business has had a new branch, transactions, sales, loan, ect. within 7 days)
Banking
0: You have no bank
1: You have a bank, but it isn't used
2: You have a bank that has had at least one transaction
3: You have a bank that gives out loans, has saving accounts, has transactions, ect.
Stock Market
0: You don't have a stock market
1: You have a stock market, but it has not been updated (no transactions) within 7 days or has never been used
2: You have a stock market that is active
3: The stock market has at least 2 transactions every day
Average Cost of Stock
Find the sum of all the stocks sold in your stock market and find its average.
0: 0 is the quotient of your stock
1: 1<x<7 is the quotient of your stock
2: 8<x<13 is the quotient of your stock
3: 14<x<20 is the quotient of your stock
4: 21<x<27 is the quotient of your stock
5: 28<x<34 is the quotient of your stock
6: 35<x<42 is the quotient of your stock
7: 43+ is the quotient of your stock
Stock Transactions Within Seven Days
Take the number of stock transactions that have occurred within seven days and divide by 2.
Number of Businesses With Stock Transactions Within Seven Days Take the number of businesses that have had a stock transaction within the last seven days and divide by 2.
Economic Indicator
Within the last seven days:
.5: Stock Market is rising
0: Stock Market did not rise or fall
-.5: Stock Market is falling
This can be figured out by averaging all the current prices of stock and comparing the price with the last update price. If the new price is higher, then the Stock Market is rising. If the price new is the same, the Stock Market did not rise or fall. If the new price is lower, the Stock Market is falling.
Manufacturing
1: No companies ever made a product that has been sold in that country
2: 1-3 different products have been sold
3: 4-7 different products have been sold
4: 8-10 different products have been sold
5: 11+ different products have been sold
Demographics
.5 for each of the following:
Largest Population
Largest Armed Forces
Fastest Growing Population in 1 Month
Largest Economy (most active stock market and most transactions)
Relations With the Most Nations
Most Businesses
Least Unemployment
Richest Country

 The equation is: {[P+A+E+B+(C/2)+K+S+V+(R/2)+(T/2)+I+M+(D)]/10}

 P = Population Level
A = Activity Level
E = Economy Level
B = Business Level
C = Business Activity Level
K = Banking
S = Stock Market
V = Average Cost of Stock
R = Number of Stock Transactions Within Seven Days
T = Number of Businesses With Stock Transactions Within Seven Days
I = Economic Indicator
M = Manufacturing
D = Demographics
 

WHAT THIS MEANS: Let's say that another country (for example, the Republic of Turnips) has a rate of one and Jasonia has a rate of two. The currency between Jasonia and the RoP would be 2/1. To exchange 10 Jasonian dollars, simply multiply by the rate, putting the value of the currency you have on two and the value of the currency you are converting to on bottom. 10 * 2 / 1 = 20. So,  µ10 gives your 20 Turnip Dollars.
 
 

    The worth of each stock is computed to a value. That value is the current worth of that company's stock, in the currency of the company's home country. The amounts are then translated into Jasonia currency by the Ministry of Economy, for easy reference to the citizens.

    To buy stocks, exchange your currency into the currency of the company's home country, and then buy shares at the current worth. The Flying Islands also has their own stock exchange named the FIEX. (Flying Islands Exchange) Since having a strong stock exchange helps the value of  our currency, it is highly recommended that you buy and sell at the FIoJ stock market.

    If all that left you confused, I'll give you another example. The country above has a stock that sells for two Turnip Dollars. You want to buy 3 shares. You multiply the rate of the stock (2/share) by the amount you want to buy (3 shares), then multiply by the rate (1/2, because we are converting backwards)

(3*2) *  1/2 = 6 * 1/2 =  6/2 =  3

It would cost you µ3 to buy two of these stocks.
It would cost a Turnipian 6 of Turnip Dollars.