Yes, with a brokerage account (and assets in the account) one may buy and sell shares on a daily basis.
In most countries you must be atleast 18 years old in order to buy/sell shares by yourself
yes
In order to buy and sell shares an account must be established with a financial institution or brokerage house. Some companies may require a specified minimum initial deposit in order to open an account. After being approved to open a stock brokerage account an investor is able to purchase or sell shares of stock in any publicly traded company. Most investors purchase shares in increments of 100 shares known as a round lot.
stockbroker A+ users.
stock exchange
According to Stephen Gandal at finance.fortune.cnn.com: "Following its IPO, Facebook had just over 421 million shares available to buy and sell on a daily basis. According to Facebook's prospectus, the RSUs will add an additional 277 million shares six months after the company's IPO."
buy and sell shares
In most countries you must be atleast 18 years old in order to buy/sell shares by yourself
yes
In order to buy and sell shares an account must be established with a financial institution or brokerage house. Some companies may require a specified minimum initial deposit in order to open an account. After being approved to open a stock brokerage account an investor is able to purchase or sell shares of stock in any publicly traded company. Most investors purchase shares in increments of 100 shares known as a round lot.
stockbroker A+ users.
To determine cost basis you want to take the total amount paid + commission and calculate your cost per share. Lets say the stock was $10 per share and you bought 1000 shares with a commission of $10. Total cost would be $10,010. Divide that number by 1000 to get your cost per share. This equals $10.01 per share. If you sold 100 shares your cost basis is $1001. If you sold 900 shares your cost basis is $9009. To go one step further when you sell the stock subtract the commission from the sales proceeds. If you sold 100 shares of the stock at $15 with a $10 dollar commission then your total sales proceeds will be $1490. Now just take the sales proceeds of $1490 - the cost basis of $1001 to determine your capital gains or losses. In this example you have a gain of $489. Use this same process to determine gains and losses for the other 900 shares.
Money can be made by investors who buy and sell gold coins on a daily basis, the price of gold does not fluctuate too much so knowing when and who to sell to requires knowledge of the markets you are selling to and buying from.
stock exchange
You have three options once the vesting period is over. You can buy shares at their vested value and hold them for a long time, you can buy shares at their vested value and then sell them after the waiting period (if applicable), or you can buy shares at their vested value, keep some and sell the rest. Good luck!
This is called arbitrage....as simple as that
A place where you can buy and sell shares of stock is usually called a "stock exchange" in English and a bourse in French.