What is the minimum lot size (number of shares) for the London Stock Exchange?
"Good question! It seems to me that there is no minimum order size for shares trading on the LSE. Please note, I couldn't find an definite answer, but: According to the ""International Order Book"" document (see: http://www.londonstockexchange.com/traders-and-brokers/rules-regulations/change-and-updates/stock-exchange-notices/2010/n2210_attach1.pdf) from the LSE (page 7): Question 7: Would respondents support a revision of the minimum order    size of 50 units?   Whilst there was   limited support for a low value based   minimum order size the  majority of   respondents requested its complete   removal.  This was  incorporated into   the September 2010 quarterly review as   per Service  Announcement 001/100910   and as from 20 September 2010, the   minimum  order size in all IOB   securities has been 1 unit Even though not all trading on the LSE is performed on this IOB system, it would be very wierd if the international stocks can be traded in any size, while domestic stocks will have an minimum size. Further, consider looking to the times and sales of various stocks (here you can find an example http://www.londonstockexchange.com/exchange/prices-and-markets/stocks/exchange-insight/trade-data.html?page=0&fourWayKey=GB0006731235GBGBXSET1&formName=frmRow&upToRow=-1). Those trades also suggest that there is no minimum order size (for example, I just saw an executed trade with an size of 13). At last, look at the Interactive Brokers (no relationship with) Exchange List at http://www.interactivebrokers.com/en/trading/exchanges.php?exch=lse&showcategories=&ib_entity=llc. Here you can click on various stock names, and in the popup window that opens, look for 'size parameters' and the size increment. I could only find stocks with an size increment of 1 (i.e. you can trade anything with a minimum of 1 stock, and more needs to be in steps of 1 stock). Even though I couldn't find official information on the LSE site (like a leaflet for beginners or such), it does seem to me that you can trade any size you want on LSE.  Please note that mutual funds and illiquid OTC stocks which don't have an continuous market can have different rules, so double-check with your broker." 1 lot is 100 shares on London stock exchange
"That article, like almost any article written by a non-expert and quoting only ""research"" from lobbying groups, hugely misses the point. The vast majority of orders that end up being cancelled are cancelled as a standard part of exchanges' official market-maker programs. Each exchange wants you and me to know that it has liquidity -- that when we go to buy or sell some stock, there will be someone waiting on the other side of the trade.  So the exchange pays (via lowered fees or even rebates) hundreds of registered market makers to constantly have orders resting in each product's order book within a few ticks of the current NBBO or the last trade price.  That way, if everyone else should suddenly disappear from the market, you and I will still be able to trade our shares for a price somewhat close to the last trade price. But market makers who are simply acting in this ""backstop"" role don't actually want to have their orders filled, because those orders will almost always lose them money. So as prices rise and fall (as much as tens of times per second), the market makers need to cancel their resting orders (so they don't get filled) and add new ones at new prices (so they meet their obligations to the exchange).  And because the number of orders resting in any given product's order book is vastly larger than the number of actual trades that take place in any given time period, naturally the number of cancellations is also going to hugely outweigh the number of actual trades.  As much as 97% to 3% (or even more). But that's completely fine! You and I don't have to care about any of that.  We almost never need the market makers to be there to trade with us.  They're only there as a backstop.  There's almost always plenty of organic liquidity for us to trade against.  Only in the rare case where liquidity completely dries up do we really care that the registered market makers are there.  And in those cases (ideally) the market makers can't cancel their orders (depending on how well the exchange has set up its market maker program). So, to answer your question, the effect of standard order cancellation on a stock is essentially none.  If you were to visualize the resting orders in a product's book as prices moved up and down, you would essentially see a Gaussian distribution with mean at the last trade price, and it would move up and down with the price.  That ""movement"" is accomplished by cancellations followed by new orders. P.S. As always, keep in mind that your and my orders almost never actually make it to a real stock exchange anymore.  Nowadays they are almost always sent to brokers' and big banks' internal dark pools.  And in there you and I have no idea what shenanigans are going on.  As just one example, dark pools allow their operators and (for a fee) other institutional participants access to a feature called last look that allows them to cancel their resting order as late as after your order has been matched against it! :( Regarding the question in your comment ... If Alice is sending only bona fide orders (that is, only placing an order at time T if, given all the information she has at time T, she truly wants and intends for it to be filled) then her cancellation at a later time actually adds to the effectiveness of and public perception of the market as a tool for price discovery (which is its ultimate purpose). [In the following example imagine that there are no such things as trading fees or commissions or taxes.] Let's say Alice offers to buy AAPL at $99.99 when the rest of the market is trading it for $100.00.  By doing so she is casting her vote that the ""fair value"" of a share of AAPL is between $99.99 and $100.00. After all, if she thought the fair value of a share of AAPL was higher --  say, between $100.00 and $100.01 -- then she should be willing to pay $100.00 (because that's below fair value) and she should expect that other people in the market will not soon decide to sell to her at $99.99. If some time later Alice does decide that the fair value of AAPL is between $100.00 and $100.01 then she should definitely cancel her order at $99.99, for exactly the reason discussed above.  She probably won't get filled at $99.99, and by sitting there stubbornly she's missing out (potentially forever) on the possibility to make a profit. Through the simple act of cancelling her $99.99 order, Alice is once again casting a vote that she no longer thinks that's AAPL's fair value.  She is (very slightly) altering the collective opinion of the entire market as to what a share of AAPL is worth.  And if her cancellation then frees her up to place another order closer to her perceived fair value (say, at $100.00), then that's another vote for her honest optinion about AAPL's price. Since the whole goal of the market is to get a bunch of particpants to figure out the fair value of some financial instrument (or commodity, or smart phone, or advertising time, etc.), cancellations of honest votes from the past in order to replace them with new, better-informed honest votes in the present can only be a good thing for the market's effectiveness and perceived effectiveness. It's only when participants start sending non-honest votes (non bona fide orders) that things start to go off the rails.  That's what @DumbCoder was referring to in his comment on your original question." Yes it is legal, in fact according to statistics.gov.uk, foreign investors are the largest holders of UK shares (as of 2008). Investors from outside the UK owned 41.5 per cent of shares listed on the London Stock Exchange at the end of 2008, up from 40.0 per cent at end of 2006, according to the latest Office for National Statistics report on share ownership. Its hard to write much in those comment boxes, so I'll just make an answer, although its really not a formal answer. Regarding commissions, it costs me $5 per trade, so that's actually $10 per trade ($5 to buy, $5 to sell).  An ETF like TNA ($58 per share currently) fluctuates $1 or $2 per day.  IXC is $40 per share and fluctuates nearly 50 cents per day (a little less).  So to make any decent money per trade would mean a share size of 50 shares TNA which means I need $2900 in cash (TNA is not marginable). If it goes up $1 and I sell, that's $10 for the broker and $40 for me.  I would consider this to be the minimum share size for TNA.  For IXC, 100 shares would cost me $4000 / 2 = $2000 since IXC is marginable.  If IXC goes up 50 cents, that's $10 for the broker and $40 for me.  IXC also pays a decent dividend.  TNA does not.  You'll notice the amount of cash needed to capture these gains is roughly the same. (Actually, to capture daily moves in IXC, you'll need a bit more than $2000 because it doesn't vary quite a full 50 cents each day). At first, I thought you were describing range trading or stock channeling, but those systems require stop losses when the range or channel is broken.  You're now talking about holding forever until you get 1 or 2 points of profit.  Therefore, I wouldn't trade stocks at all.  Stocks could go to zero, ETFs will not.  It seems to me you're looking for a way to generate small, consistent returns and you're not seeking to strike it rich in one trade.  Therefore, buying something that pays a dividend would be a good idea if you plan to hold forever while waiting for your 1 or 2 points. In your system you're also going to have to define when to get back in the trade.  If you buy IXC now at $40 and it goes to $41 and you sell, do you wait for it to come back to $40?  What if it never does?  Are you happy with having only made one trade for $40 profit in your lifetime?  What if it goes up to $45 and then dips to $42, do you buy at $42?  If so, what stops you from eventually buying at the tippy top?  Or even worse, what stops you from feeling even more confident at the top and buying bigger lots?  If it gets to $49, surely it will cover that last buck to $50, right? /sarc What if you bought IXC at $40 and it went down.  Now what?  Do you take up gardening as a hobby while waiting for IXC to come back?  Do you buy more at lower prices and average down?  Do you find other stocks to trade?  If so, how long until you run out of money and you start getting margin calls?  Then you'll be forced to sell at the bottom when you should be buying more. All these systems seem easy, but when you actually get in there and try to use them, you'll find they're not so easy.  Anything that is obvious, won't work anymore.  And even when you find something that is obvious and bet that it stops working, you'll be wrong then too.  The thing is, if you think of it, many others just like you also think of it... therefore it can't work because everyone can't make money in stocks just like everyone at the poker table can't make money.  If you can make 1% or 2% per day on your money, that's actually quite good and not too many people can do that.  Or maybe its better to say, if you can make 2% per trade, and not take a 50% loss per 10 trades, you're doing quite well. If you make $40 per trade profit while working with $2-3k and you do that 50 times per year (50 trades is not a lot in a year), you've doubled your money for the year.  Who does that on a consistent basis?  To expect that kind of performance is just unrealistic.  It much easier to earn $2k with $100k than it is to double $2k in a year.  In stocks, money flows TO those who have it and FROM those who don't. You have to plan for all possibilities, form a system then stick to it, and not take on too much risk or expect big (unrealistic) rewards. Daytrading You make 4 roundtrips in 5 days, that broker labels you a pattern daytrader.  Once you're labeled, its for life at that brokerage.  If you switch to a new broker, the new broker doesn't know your dealings with the old broker, therefore you'll have to establish a new pattern with the new broker in order to be labeled.  If the SEC were to ask, the broker would have to say 'yes' or 'no' concering if you established a pattern of daytrading at that brokerage. Suppose you make the 4 roundtrips and then you make a 5th that triggers the call.  The broker will call you up and say you either need to deposit enough to bring your account to $25k or you need to never make another daytrade at that firm... ever!  That's the only warning you'll ever get.  If you're in violation again, they lock your account to closing positions until you send in funds to bring the balance up to $25k.  All you need to do is have the money hit your account, you can take it right back out again.  Once your account has $25k, you're allowed to trade again.... even if you remove $15k of it that same day.  If you trigger the call again, you have to send the $15k back in, then take it back out. Having the label is not all bad... they give you 4x margin.  So with $25k, you can buy $100k of marginable stock.  I don't know... that could be a bad thing too.  You could get a margin call at the end of the day for owning $100k of stock when you're only allowed to own $50k overnight.  I believe that's a fed call and its a pretty big deal. "There's no need for an index to have a currency as its purpose is not to act as an asset but rather to signal investors about the performance of a collection of stocks. An index can be price-weighted, meaning that its value equals the (arithmetic) average of the prices of each stock in the index. With no stock splits, the return on this index is the same as the return on a portfolio composed of one share of each stock. If there is a stock split, however instead of dividing by the number of stocks, as you normally would when taking the arithmetic average, you divide it by the number that will make the value of the index pre-stock-split (arithmetic average) equal to the value post stock split. Then use that dividing number for all periods until a new stock split occurs.  An index can be value-weighted, meaning that its changes in value track the percentage changes in total market capitalization of the stocks in the index. Price weighted indexes ignore for ""firm size"" and percentage changes in price weighted indexes are not robust to stock-splits. Value weighted indexes take ""firm size"" into account and are robust to stock-splits. DJIA is price-weighted. S&P 500 is value-weighted." Market cap should be share price times number of shares, right? That's several orders of magnitude right there... "listed simultaneously in New York, London, and maybe even some Asian markets - is this correct? If the exchanges are not connected, then in primary market the shares are listed. On other exchanges, the ""Depository Receipts"" are listed. i.e. the Company will keep say 100,000 shares with the primary stock exchange / depository. Based on this it would create new instruments ""Depository Receipts"". They can be 1:1 or whatever ratio. hypothetically, if I want to buy all of the company's stock Even if it is on one exchange, buying all stocks would trigger various regulatory aspects of Companies Act, or Stock Exchange rules. This is not simple or easy like clicking some buttons and buying everything. That is, let's say that in New York the company has listed 1000 shares, and in London only 10 shares, each worth 10 USD Market capitalization is sum of all outstanding shares into value." Well, the potential problem is that the FTSE 100 could go down, or just not up. Really, it's as simple as that. After all, why diversify if the FTSE 100 will only go up? So, the question is, why wait to diversify? Why not add in the Gilt ETF for a little government bond exposure? Why not a Corp. bond ETF? Maybe a little of that Global ex-UK for a little foreign stock exposure?  That said, saving is better than not saving, so if starting it off with just the FTSE 100 gets you saving, go for it. This is more than likely a thing about your financial institution and the exchanges where they trade shares. Some exchanges cannot/will not handle odd lot transactions. Most established brokerages have software and accounting systems that will deal in round lots with the exchanges, but can track your shares individually. Sometimes specific stocks cannot be purchased in odd lots due to circumstances specific to that stock (trading only on a specific exchange, for example).  Most brokerages offer dollar-cost averaging programs, but may limit which stocks are eligible, due to odd lot and partial share purchases. Check with your brokerage to see if they can support odd lot and/or DCA purchases. You may find another similar ETF with similar holdings that has better trading conditions, or might consider an open-end mutual fund with similar objectives. Mutual funds allow partial share purchases (you have $100 to invest today, and they issue you 35.2 shares, for example).