Implications of a Canadian company IPO having a dual TSX/NYSE stock listing?
Investors who are themselves Canadian and already hold Canadian dollars (CAD) would be more likely to purchase the TSX-listed shares that are quoted in CAD, thus avoiding the currency exchange fees that would be required to buy USD-quoted shares listed on the NYSE. Assuming Shopify is only offering a single class of shares to the public in the IPO (and Shopify's form F-1 only mentions Class A subordinate voting shares as being offered) then the shares that will trade on the TSX and NYSE will be the same class, i.e. identical. Consequently, the primary difference will be the currency in which they are quoted and trade. This adds another dimension to possible arbitrage, where not only the bare price could deviate between exchanges, but also due to currency fluctuation. An additional implication for a company to maintain such a dual listing is that they'll need to adhere to the requirements of both the TSX and NYSE. While this may have a hard cost in terms of additional filing requirements etc., in theory they will benefit from the additional liquidity provided by having the multiple listings. Canadians, in particular, are more likely to invest in a Canadian company when it has a TSX listing quoted in CAD. Also, for a company listed on both the TSX and NYSE, I would expect the TSX listing would be more likely to yield inclusion in a significant market index—say, one based on market capitalization, and thus benefit the company by having its shares purchased by index ETFs and index mutual funds that track the index. I'll also remark that this dual U.S./Canadian exchange listing is not uncommon when it comes to Canadian companies that have significant business outside of Canada.
The other answer has some good points, to which I'll add this:  I believe you're only considering a company's Initial Public Offering (IPO), when shares are first offered to the public.  An IPO is the way most companies get a public listing on the stock market. However, companies often go to market again and again to issue/sell more shares, after their IPO.  These secondary offerings don't make as many headlines as an IPO, but they are typical-enough occurrences in markets. When a company goes back to the market to raise additional funds (perhaps to fund expansion), the value of the company's existing shares that are being traded is a good indicator of what they may expect to get for a secondary offering of shares. A company about to raise money desires a higher share price, because that will permit them to issue less shares for the amount of money they need.  If the share price drops, they would need to issue more shares for the same amount of money – and dilute existing owners' share of the overall equity further. Also, consider corporate acquisitions:  When one company wants to buy another, instead of the transaction being entirely in cash (maybe they don't have that much in the bank!), there's often an equity component, which involves swapping shares of the company being acquired for new shares in the acquiring company or merged company.  In that case, the values of the shares in the public marketplace also matter, to provide relative valuations for the companies, etc. "First, your question contains a couple of false premises: Options in the U.S. do not trade on the NYSE, which is a stock exchange.  You must have been looking at a listing from an options exchange. There are a handful of options exchanges in the U.S., and while two of these have ""NYSE"" in the name, referring to ""NYSE"" by itself still refers to the stock exchange. Companies typically don't decide themselves whether options will trade for their stock.  The exchange and other market participants (market makers) decide whether to create a market for them. The Toronto Stock Exchange (TSX) is also a stock exchange.  It doesn't list any options.  If you want to see Canadian-listed options on equities, you're looking in the wrong place. Next, yes, RY does have listed options in Canada. Here are some.  Did you know about the Montreal Exchange (MX)?  The MX is part of the TMX Group, which owns both the Toronto Stock Exchange (TSX) and the Montreal Exchange. You'll find lots of Canadian equity and index options trading at the MX.  If you have an options trading account with a decent Canadian broker, you should have access to trade options at the MX. Finally, even considering the existence of the MX, you'll still find that a lot of Canadian companies don't have any options listed.  Simply: smaller and/or less liquid stocks don't have enough demand for options, so the options exchange & market makers don't offer any. It isn't cost-effective for them to create a market where there will be very few participants." Yes that is the case for the public company approach, but I was referring to the transaction approach:   Firm A and Firm B both have $100 in EBITDA. Firm A has $50 in cash, Firm B has $100 in cash.  Firm A sells for $500, Firm B sells for $600.  If we didn't subtract cash before calculating the multiple: Firm A: 5x Firm B: 6x  If we DO subtract cash before calculating the multiple: Firm A: 4.5x Firm B: 5x  So yea, subtracting cash does skew the multiple. Say a stock is listed in Nasdaq, and the same company has a stock listed in Tsx. Does the Nasdaq price affect the Tsx price as trading commences? Not directly. Basically, an exchange is a market, and the price is defined only by supply and demand in that market. However, any substantial price differential for a commodity traded in multiple market creates an arbitrage opportunity, and there are many traders whose job it is exactly to find and use such opportunities. Their activity in turn has the effect of reducing the price differentials to the point where transaction costs make them unprofitable. With high-frequency traders around, the time for a price differential to disappear is nowadays measured in milliseconds. If a trader buys from one exchange, will it affect the price of the other? Only through the mechanism mentioned above.  Are there any benefits to being listed in two exchanges? It increases the liquidity of a stock. It's impossible to know for sure, which I'm sure you know, but paying these large debts all at once will leave very little assets in comparison to what they had.    Issuing new shares like this is called dilution which means the price will be forced downward because the same (or in this case less) net earnings must be divided by more shares outstanding. A secondary offering almost always lowers stock price.   http://wiki.fool.com/What_Happens_to_the_Share_Price_When_New_Shares_Are_Issued%3F I'd add, this is actually the way any stock opens every day, i.e. the closing price of the prior day is what it is, but the opening price will reflect whatever news there was prior to the day's open. If you watch the business news, you'll often see that some stock has an order imbalance and has not opened yet, at the normal time. So, as Geo stated, those who were sold shares at the IPO price paid $38, but then the stock could open at whatever price was the point where bid and ask balanced.   I snapped a screen capture of this chart on the first day of trading, the daily charts aren't archived where I can find them. This is from Yahoo Finance. You can see the $42 open from those who simply wanted in but couldn't wait, the willingness of sellers to grab their profit right back to what they paid, and then another wave of buying, but then a sell-off. It closed virtually unchanged from the IPO price. There could also be some degree of dilution at play here. If they are rapidly expanding and hiring, or if they took on another round of funding each share may have a lower amount of value though the company might be worth more than they were previously. The newly issued options may also be of a different class. "If you own a stake large enough to do that, you became regulated - under Section 13(d) of the 1934 Act and Regulation (in case of US stock) and you became regulated. Restricting you from ""shocking"" market. Another thing is that your broker will probably not allow you to execute order like that - directed MKT order for such volume. And market is deeper than anyone could measure - darkpools and HFTs passively waiting for opportunities like that." I didn't say only the IPO I just said public offerings. Trades between secondary investors would be taxed at a higher level. I also understand the difference between loaning money to a company and investing in equity.  Personally I think that loans are underused in today's investment world because people are too focused on getting the most out of the few big winners. If the share is listed on a stock exchange that creates liquidity and orderly sales with specialist market makers, such as the NYSE, there will always be a counterparty to trade with, though they will let the price rise or fall to meet other open interest.  On other exchanges, or in closely held or private equity scenarios, this is not necessarily the case (NASDAQ has market maker firms that maintain the bid-ask spread and can do the same thing with their own inventory as the specialists, but are not required to by the brokerage rules as the NYSE brokers are).  The NYSE has listing requirements of at least 1.1 million shares, so there will not be a case with only 100 shares on this exchange. If you aren't familiar with Norbert's Gambit, it's worth looking at. This is a mechanism using a Canadian brokerage account to simultaneously execute one stock trade in CAD and one in USD. The link I provided claims that it only starts potentially making sense somewhere in the 10,000+ range. You probably bought the cross listed WestJet stock.  If you wanted to buy shares on the TSE, I'd suspect you'd have to find a way to open a brokerage account within Canada and then you'd be able to buy the shares.  However, this could get complicated to some extent as there could be requirements of Canadian tax stuff like a Social Insurance Number that may require some paperwork.  In addition, you'd have to review tax law of both countries to determine how to appropriately report to each country your income as there are various rules around that. TD Waterhouse would be the Canadian subsidiary of TD Ameritrade though I haven't tried to create a Canadian brokerage account. Twitter is planning to go public on NYSE. You'll be able to start trading once the stock is listed for trading, which would be the day of the IPO.  Note that since you're trading on the secondary market, you won't be able to buy at the IPO prices, whatever the time is. You're buying from someone who bought at IPO price. It depends on the timing of the events. Sometimes the buying company announces their intention but the other company doesn't like the deal. It can go back and forth several times, before the deal is finalized. The specifics of the deal determine what happens to the stock: The deal will specify when the cutoff is. Some people want the cash, others want the shares.  Some will speculate once the initial offer is announced where the final offer (if there is one) will end up. This can cause a spike in volume, and the price could go up or down. Regarding this particular deal I did find the following: http://www.prnewswire.com/news-releases/expedia-to-acquire-orbitz-worldwide-for-12-per-share-in-cash-300035187.html Additional Information and Where to Find It Orbitz intends to file with the SEC a proxy statement as well as other   relevant documents in connection with the proposed transaction with   Expedia. The definitive proxy statement will be sent or given to the   stockholders of Orbitz and will contain important information about   the proposed transaction and related matters. SECURITY HOLDERS ARE   URGED TO READ THE PROXY STATEMENT CAREFULLY WHEN IT BECOMES AVAILABLE   AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY   AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL   CONTAIN IMPORTANT INFORMATION. The proxy statement and other relevant   materials (when they become available), and any other documents filed   by Expedia or Orbitz with the SEC, may be obtained free of charge at   the SEC's website, at www.sec.gov. In addition, security holders will   be able to obtain free copies of the proxy statement from Orbitz by   contacting Investor Relations by mail at ATTN: Corporate Secretary,   Orbitz Worldwide, Inc., 500 W. Madison Street, Suite 1000, Chicago,   Illinois 60661. This is not what you normally get told, including by partners who were there at the time.  What IPO were you referring to? Andersen Consulting / Accenture's IPO was some time after the split.  Edit: spun off? It wasn't what you'd call a friendly split