Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What are dividends, when are they paid, and how do they affect my position?
Dividends are normally paid in cash, so don't generally affect your portfolio aside from a slight increase to 'cash'.  You get a check for them, or your broker would deposit the funds into a money-market account for you.  There is sometimes an option to re-invest dividends, See Westyfresh's answer regarding Dividend Re-Investment Plans. As Tom Au described, the dividends are set by the board of directors and announced.  Also as he indicated just before the 'record' date, a stock which pays dividends is worth slightly more (reflecting the value of the dividend that will be paid to anyone holding the stock on the record date) and goes down by the dividend amount immediately after that date (since you'd now have to hold the stock till the next record date to get a dividend)  In general unless there's a big change in the landscape (such as in late 2008) most companies pay out about the same dividend each time, and changes to this are sometimes seen by some as 'indicators' of company health and such news can result in movement in the stock price. When you look at a basic quote on a ticker symbol there is usually a line for Div/yeild which gives the amount of dividend paid per share, and the relative yeild (as a percentage of the stock price).  If a company has been paying dividends, this field will have values in it, if a company does not pay a dividend it will be blank or say NA (depending on where you get the quote).  This is the easiest way to see if a company pays a dividend or not.  for example if you look at this quote for Google, you can see it pays no dividend  Now, in terms of telling when and how much of a dividend has been paid, most financial sites have the option when viewing a stock chart to show the dividend payments.  If you expand the chart to show at least a year, you can see when and how much was paid in terms of dividends.  For example you can see from this chart that MSFT pays dividends once a quarter, and used to pay out 13 cents, but recently changed to 16 cents.   if you were to float your mouse over one of those icons it would also give the date the dividend was paid.