Is there a difference between buying few shares of an expensive stock vs many shares of an inexpensive one?
"Before the prevalence of electronic trading, trading stocks was very costly, dropping from ~15c in the late 1970s to less than a nickel per share today.  Exchange fees for liquidity takers are ~0.3c per share, currently. When orders were negotiated exclusively by humans, stocks used to be quoted in fractions rather than decimal, such as $50 1/2 instead of something more precise like $50.02. That necessary ease of negotiation for humans to rapidly trade extended to trade size as well.  Traders preferred to handle orders in ""round lots"", 100 shares, for ease of calculation of the total cost of the trade, so 100 shares at $50 1/2 would have a total cost of $5,050.  The time for a human to calculate an ""odd lot"" of 72 shares at $50.02 would take much longer so would cost more per share, and these costs were passed on to the client. These issues have been negated by electronic trading and simply no longer exist except for obsolete brokerages.  There are cost advantages for extremely large trades, well above 100 shares per trade. Brokerage fees today run the gamut: they can be as insignificant as what Interactive Brokers charges to as high as a full service broker that could charge hundreds of USD for a few thousand USD trade.  With full service brokerages, the charges are frequently mystifying and quoted at the time a trade is requested.  With discount brokerages, there is usually a fee per trade and a fee per share or contract.  Interactive Brokers will charge a fee per share or option only and will even refund parts of the liquidity rebates exchanges provide, as close as possible to having a seat on an exchange.  Even if a trader does not meet Interactive Brokers' minimum trading requirement, the monthly fee is so low that it is possible that a buy and hold investor could benefit from the de minimis trade fees. It should be noted that liquidity providing hidden orders are typically not rebated but are at least discounted. The core costs of all trades are the exchange fees which are per share or contract.  Over the long run, costs charged by brokers will be in excess of charges by exchanges, and Interactive Brokers' fee schedule shows that it can be reduced to a simple markup over exchange fees.   Exchanges sometimes have a fee schedule with lower charges for larger trades, but these are out of reach of the average individual." One difference is the bid/ask spread will cost you more in a lower cost stock than a higher cost one. Say you have two highly liquid stocks with tiny spreads: If you wanted to buy say $2,000 of stock: Now imagine these are almost identical ETFs tracking the S&P 500 index and extrapolate this to a trade of $2,000,000 and you can see there's some cost savings in the higher priced stock. As a practical example, recently a popular S&P 500 ETF (Vanguard's VOO) did a reverse split to help investors minimize this oft-missed cost.
"Most of the investors who have large holdings in a particular stock have pretty good exit strategies for those positions to ensure they are getting the best price they can by selling gradually into the volume over time. Putting a single large block of stock up for sale is problematic for one simple reason: Let's say you have 100,000 shares of a stock, and for some reason you decide today is the day to sell them, take your profits, and ride off into the sunset.  So you call your broker (or log into your brokerage account) and put them up for sale.  He puts in an order somewhere, the stock is sold, and your account is credited. Seems simple, right?  Well...not so fast. Professionals - I'm keeping this simple, so please don't beat me up for it! The way stocks are bought and sold is through companies known as ""market makers"".  These are entities which sit between the markets and you (and your broker), and when you want to buy or sell a stock, most of the time the order is ultimately handled somewhere along the line by a market maker.  If you work with a large brokerage firm, sometimes they'll buy or sell your shares out of their own accounts, but that's another story. It is normal for there to be many, sometimes hundreds, of market makers who are all trading in the same equity.  The bigger the stock, the more market makers it attracts.  They all compete with each other for business, and they make their money on the spread between what they buy stock from people selling for and what they can get for it selling it to people who want it. Given that there could be hundreds of market makers on a particular stock (Google, Apple, and Microsoft are good examples of having hundreds of market makers trading in their stocks), it is very competitive.  The way the makers compete is on price.  It might surprise you to know that it is the market makers, not the markets, that decide what a stock will buy or sell for. Each market maker sets their own prices for what they'll pay to buy from sellers for, and what they'll sell it to buyers for.  This is called, respectively, the ""bid"" and the ""ask"" prices.  So, if there are hundreds of market makers then there could be hundreds of different bid and ask prices on the same stock.  The prices you see for stocks are what are called the ""best bid and best ask"" prices.  What that means is, you are being shown the highest ""bid"" price (what you can sell your shares for) and the best ""ask"" price (what you can buy those shares for) because that's what is required.  That being said, there are many other market makers on the same stock whose bid prices are lower and ask prices are higher.  Many times there will be a big clump of market makers all at the same bid/ask, or within fractions of a cent of each other, all competing for business.  Trading computers are taught to seek out the best prices and the fastest trade fills they can. The point to this very simplistic lesson is that the market makers set the prices that shares trade at.  They adjust those prices based (among other factors) on how much buying and selling volume they're seeing.  If they see a wave of sell orders coming into the system then they'll start marking down their bid prices.  This keeps them from paying too much for shares they're going to have to find a buyer for eventually, and it can sometimes slow down the pace of selling as investors and automated systems notice the price decline and decide to wait to sell.  Conversely, if market makers see a wave of buy orders coming into the system, they'll start marking their ask prices up to maximize their gains, since they're selling you shares they bought from someone else, presumably at a lower price.  But they typically adjust their prices up or down before they actually fill trades.  (sneaky, eh?) Depending on how much volume there is on the shares of the company you're selling, and depending on whether there are more buyers than sellers at the moment, your share sell order may be filled at market by a market maker with no real consequence to the share's price. If the block is large enough then it's possible it will not all sell to one market maker, or it might not all happen in one transaction or even all at the same price. This is a pretty complex subject, as you can see, and I've cut a LOT of corners and oversimplified much to keep it comprehensible.  But the short answer to your question is -- it depends. Hope this helps. Good luck!" "I think you are asking about actively managed funds vs. indexes and possibly also vs. diversified funds like target date funds. This is also related to the question of mutual fund vs. ETF. First, a fund can be either actively managed or it can attempt to track an index. An actively managed fund has a fund manager who tries to find the best stocks to invest in within some constraints, like ""this fund invests in large cap US companies"". An index fund tries to match as closely as possible the performance of an index like the S&P 500. A fund may also try to offer a portfolio that is suitable for someone to put their entire account into. For example, a target date fund is a fund that may invest in a mix of stocks, bonds and foreign stock in a proportion that would be appropriate to someone expecting to retire in a certain year. These are not what people tend to think of as the canonical examples of mutual funds, even though they share the same legal structure and investment mechanisms. Secondly, a fund can either be a traditional mutual fund or it can be an exchange traded fund (ETF). To invest in a traditional mutual fund, you send money to the fund, and they give you a number of shares equal to what that money would have bought of the net asset value (NAV) of the fund at the end of trading on the day they receive your deposit, possibly minus a sales charge. To invest in an ETF, you buy shares of the ETF on the stock market like any other stock. Under the covers, an ETF does have something similar to the mechanism of depositing money to get shares, but only big traders can use that, and it's not used for investing, but only for people who are making a market in the stock (if lots of people are buying VTI, Big Dealer Co will get 100,000 shares from Vanguard so that they can sell them on the market the next day). Historically and traditionally, ETFs are associated with an indexing strategy, while if not specifically mentioned, people assume that traditional mutual funds are actively managed. Many ETFs, notably all the Vanguard ETFs, are actually just a different way to hold the same underlying fund. The best way to understand this is to read the prospectus for a mutual fund and an ETF. It's all there in reasonably plain English." Edited in response to JoeTaxpayer's comment and OP Tim's additional question. To add to and clarify a little what littleadv has said, and to answer  OP Tim's next question: As far as the IRS is concerned, you have at most one Individual Retirement Account of each type (Traditional, Roth) though the money in each IRA can be invested with as many different custodians (brokerages, banks, etc.) and different investments as you like. Thus, the maximum $5000 ($6000 for older folks) that you can contribute each year can be split up and invested any which way you like, and when in later years you take a Required Minimum Distribution (RMD) from a Traditional IRA, you can get the money by selling just one of the investments, or from several investments; all that the IRS cares is that the total amount that is distributed to you is at least as large as the RMD. An important corollary is that  the balance in your IRA is the   sum total of the value of all the investments that various custodians are holding   for you in IRA accounts. There is no loss in an IRA until every penny has been withdrawn from every investment in your IRA and  distributed to you, thus making your IRA balance zero.  As long as you have a positive balance, there is no loss: everything has to come out. After the last distribution from your Roth IRA (the one that empties your entire Roth IRA, no matter where it is invested and reduces your Roth IRA balance (see definition  above) to zero), total up all the amounts that you have received as  distributions from your Roth IRA. If this is less  than the total amount of money you contributed to your Roth IRA  (this includes rollovers from a Traditional IRA or Roth 401k  etc., but not the earnings within the Roth IRA that you re-invested inside the Roth IRA), you have a loss that can be deducted on Schedule A as a Miscellaneous Deduction subject to the 2% AGI limit. This 2% is not a cap (in the sense that no more than 2% of your AGI can be deducted in this category)  but rather a threshold: you can only deduct whatever part of your total Miscellaneous Deductions exceeds  2% of your AGI. Not many people have Miscellaneous Deductions whose total exceeds 2% of their AGI, and so they end up not being able to deduct anything in this category. If you ever made nondeductible contributions to your  Traditional IRA because you were ineligible to make a  deductible contribution (income too high, pension plan  coverage at work etc), then the sum of all these contributions is your basis in your  Traditional IRA. Note that your deductible contributions, if any, are not part of the basis.  The above rules apply to  your basis in your Traditional IRA as well.  After the last distribution from your Traditional IRA (the one that empties  all your Traditional IRA accounts and reduces your Traditional IRA balance to zero), total up all the distributions that you received (don't forget to include the nontaxable part of each distribution that represents a return of the basis). If the sum total is less than your basis, you have a loss that can be deducted on Schedule A as a Miscellaneous  Deduction subject to the 2% AGI threshold. You can only deposit cash into an IRA and take a distribution in cash from an IRA. Now, as JoeTaxpayer points out, if your IRA owns stock, you can take a distribution by having the  shares transferred from your IRA account in your brokerage to your personal account in the brokerage.  However, the amount of the distribution, as reported by the brokerage to the IRS, is the value of the shares transferred as of the time of the transfer, (more generally  the fair market value of the property that is transferred out of the IRA) and this is the amount you report on your income  tax return. Any capital gain or loss on those shares remains inside the IRA because your basis (in your personal account) in the  shares that came out of the IRA is the amount of the distribution.  If you sell these shares at a later date, you will have a (taxable) gain or loss depending on whether you sold the shares for more or less than your basis. In effect, the share transfer transaction is as if you sold the shares in the IRA, took the proceeds as a cash distribution and immediately bought the same shares in your personal account, but you saved the transaction fees for the sale and the purchase and avoided paying the  difference between the buying and selling price of the shares as well as any changes in these in the microseconds that would have elapsed between the execution of the sell-shares-in-Tim's-IRA-account, distribute-cash-to-Tim, and buy-shares-in-Tim's-personal account transactions.  Of course, your broker will likely charge a fee for transferring ownership of the shares from your IRA to you.  But the important point is that any capital gain or loss within the IRA cannot be used to offset a gain or loss in your taxable accounts.  What happens inside the IRA stays inside the IRA. This is a gross simplification as there are a few different ways to do this. The principle overall is the same though. To short a stock, you borrow X shares from a third party and sell them at the current price. You now owe the lender X shares but have the proceeds from the sale. If the share price falls you can buy back those shares at the new lower price, return them to the lender and pocket the difference. The risk comes when the share price goes the other way, you now owe the lender the new value of the shares, so have to find some way to cover the difference. This happened a while back when Porsche made a fortune buying shares in Volkswagen from short sellers, and the price unexpectedly rose. Most stocks are not actively trades by lots of people.   When you buy or sell a stock the price is set by the “order book” – that is the other people looking to trade in the given stock at the same time. Without a large number of active traders, it is very likely the pricing system will break down and result in widely changing prices second by second.   Therefore for the market to work well, it need most people to be trading at the same time. A stock is only worth what someone is willing to pay for it. If it trades different values on different days, that means someone was willing to pay a higher price OR someone was willing to sell at a lower price.  There is no rule to prevent a stock from trading at $10 and then $100 the very next trade... or $1 the very next trade. (Though exchanges or regulators may halt trading, cancel trades, or impose limits on large price movements as they deem necessary, but this is beside the point I'm trying to illustrate). Asking what happens from the close of one day to the open of the next is like asking what happens from one trade to the next trade... someone simply decided to sell or pay a different price.  Nothing needs to have happened in between. You are correct in thinking actual number of shares do not matter, the value is the value.   However there are cases where share price does play a role.  Berkshire Hathaway for example has not split because Warren Buffet believes it has cut down on the liquidity of the stock, as well as attracting investors with an eye for the longer term.   There have also been things written on the psychology of a share price. For example, some people are attracted to shares that split, because it reflects a company is growing. Short answer: No, it only matters if you want to use covered calls strategies. The price of a share is not important. Some companies make stock splits from time to time so that the price of their shares is more affordable to small investors. It is a decision of the company's board to keep the price high or low. More important is the capitalization for these shares. If you have lots of money to invest, the best is to divide and invest a fixed pourcentage of your portfolio in each company you choose.  The only difference is if you eventually decide to use covered call strategies. To have a buy write on Google will cost you a lot of money and you will only be able to sell 1 option for every 100 shares. Bottom line: the price is not important, capitalization and estimated earnings are. Hope this answers your question.