What causes the shares of a stock to fluctuate so many times throughout the day?
366545
Here's a synopsis of a college course in Econ 101. The answer is that "Supply and Demand" determines price in a free market.\n\nIn the very short term, which you were watching, there are thousands of traders like myself, witht heir fingers poised over the Buy button or Sell button to be hit when certain conditions are met. You are seeing the result of the those button pushers. When many people collectively Buy the same stock, the price goes up, and when many more people sell than there are buyers, the price goes down. \n\nThat's really all there is to it, at least, within the realm of your question.
433314
Usual this does not just happen at one time of the day so if that is the case then it may be because of one or more of the things you have listed.  I suggest you eliminate them one by one ans see what happens.
332361
Day trading is buying and selling of a particular stock many times throughout the day.  Throughout the day, a stock price may change due to several things, such as volume (others buying or selling).  Day traders try to take advantage of this by buying the stock on the low swings, and selling it on the high swings.  It usually takes a lot of money to do this in order to make it worth your while.  Day traders often do this with several stocks at once.  \n\nMost on line brokers require a minimum cash account of around ten thousand dollars for you to day trade.  I can't remember the rules exactly, but Ameritrade, considers day trading as buying or selling of the same stock within a couple days.  And if you have two or three instances of this, they classify you as a day trader.\n\nStock options are something that employers offer to make a job more desirable.  Usually offering company stock on top of their normal pay.  Having stock in a company you work for also makes you care more about your company.
648807
people are buying and selling stocks all the time...
780988
Contact google and ask for an explanation.  There may have just been a glitch, not a huge conspiracy run by Google.\n\nGoogle didn't offer stock in the 1990's, they went public and sky high in value after that.   \n\nGood luck.
1152995
The price history for the stock is adjusted for the amount of the split. \nSo if it's a 2 for 1 stock split, the price would be adjusted by half not JUST FOR TODAY'S stock price, but for all the prices going back in time.\n\nIt has no effect on the value of the stock.
598926
The stock is still in a strong downward trend.\n\nIf you observe on the chart, you will notice 2 trend lines, one is still showing a strong downward trend and the other acting as a strong resistance.\n\nI suggest buying when both trend intersacts and purchase at that price, or you can drop me a mail if you require further analysis.
309804
Indonesia Fund (IF) has had major intraday gyrations recently but liquidity is bad, at least on odd lots.  I had to wait several minutes for a market order to fill a few days ago.  I have had better luck buying and selling with limit orders.\n\nBallard Power (BLDP) volatility has spiked to an extreme this month.  FCEL, AMSC, and EMKR can generally be counted on to move somewhere every day--I just wish I could figure out which way.  These aren't penny stocks.  The spreads are decent.  I don't trade them enough to comment on liquidity but market orders have always filled right away.
293105
You just have to read alot with the current source of information about the stock. Sometimes past history of the stock does not determine it's future successes.
107691
The total number of shares traded that day.
314765
There are electronic trading companies for crazy people like me who can't wait for the market to open the next day.  The prices can fluctuate wildly for some stocks because the price is determined by a handful of people that are selling and a handful that are buying.  It's open for around 3 hours after the closing bell in NY and for a few hours before the opening bell.
1041863
Primary reason? There's rarely just one reason.\n\nWhat was the reason for the stock market crash in 1929? They're still writing about it and coming up with reasons. \n\nWhat is the reason for fluctuation in prices? In the short term, it's human emotion, primarily fear and greed. In the longer term, it's supply and demand. \n\nYou listen to too much media hype, and actually think you are informed and just missed a show or something, like someone really has "THE" answer. I meet investors that read the Wall Street Journal cover to cover and think they are informed. \n\nThe stock market is a predictor of the economy six months from now. And six months from now, they will have figured out what happened today. But right now, nobody has a crystal ball.\n\nYou don't have to know "Why" or "What" or "the reason." I would say you can't possibly know that. You ask ten economists or traders, or "experts" and you'll get 11 answers. What good will that do you? You going to make decisions based on a newscaster? Just follow the price and volume of the here and now.\n\nSometimes there are no reasons. The market goes where it wants.
391496
oh it effect more than just stock in the "oil" market... it effects everthing.  from stocks to futures.  it is complex, if i were you i would go to the wall street journal
700271
I've done that with what I call 'loose change'.  Sometimes I've got a few dollars sitting around, obviously not going to make a lot of interest and not large enough for something substantial.  If some risky thing has been going down but I still feel it worth holding onto (its kinda fun when you sweat over a $90 stock moving a couple of bucks while a stock selling for less than a dime now goes for a buck or two, and yes, I've had that happen), then making an extra small trade can average down the value of your position.  When the stock starts to tick up for whatever reasons, you now have a lower break-even or profit point.  Again, it is only if you've got a few bucks left not doing anything and at Scottrade for $7 plus a half-point, it doesn't hurt much.  Of course, I also got a couple that are cluttering up my list because it will cost more to sell than they are worth today but that is part of the risk, right?
204945
It is not wise to invest all your portfolio in just one stock.\n\nI can advise you.
1178727
There are so much fluctuations in the trading of a stock sometimes it's hard to quantify one specific event.  Besides, bonus shares that are issued often is just a very small % of the total shares outstanding, you may or may not see any stock price impact because of that.
342573
These might be of help:\n\nhttp://en.wikipedia.org/wiki/Share_market\nhttp://en.wikipedia.org/wiki/Stock_exchange