Google free real-time stock quotes
Previously, Google had a delayed update for their stock prices (15 minutes I believe). That change enabled users of Google Finance to see updates to stock prices in real-time.
There are several Excel spreadsheets for downloading stock quotes (from Yahoo Finance), and historical exchange rates at http://investexcel.net/financial-web-services-kb "Can you give me a rundown of what I'm seeing?  Is this basically a super zoomed in tracker of a current stock or something?  Where a stock fluctuates a few cents up/down on the day, and you just trade before it goes down, then trade as it goes up or what?  EDIT: Is this really live?  Can you say, ""Yes this is live narwalls""" The point of that question is to test if the user can connect shares and stock price.  However, that being said yeah, you're right. Probably gives off the impression that it's a bit elementary. I'll look into changing it asap. You might have better luck using Quandl as a source.  They have free databases, you just need to register to access them.  They also have good api's, easier to use than the yahoo api's Their WIKI database of stock prices is curated and things like this are fixed (www.quandl.com/WIKI ), but I'm not sure that covers the London stock exchange.  They do, however, have other databases that cover the London stock exchange. You bought 1 share of Google at $67.05 while it has a current trading price of $1204.11. Now, if you bought a widget for under $70 and it currently sells for over $1200 that is quite the increase, no? Be careful of what prices you enter into a portfolio tool as some people may be able to use options to have a strike price different than the current trading price by a sizable difference. Take the gain of $1122.06 on an initial cost of $82.05 for seeing where the 1367% is coming. User error on the portfolio will lead to misleading statistics I think as you meant to put in something else, right? Yahoo Finance has this now, the ticker is CL=F. "P/E is Price divided by Earnings Per Share (EPS). P/E TTM is Price divided by the actual EPS earned over the previous 12 months - hence ""Trailing Twelve Month"". In Forward P/E is the ""E"" is the average of analyst expectations for the next year in EPS. Now, as to what's being displayed. Yahoo shows EPS to be 1.34. 493.90/1.34 = P/E of 368.58 Google shows EPS to be 0.85. 493.40/0.85 = P/E of 580.47 (Prices as displayed, respectively) So, by the info that they are themselves displaying, it's Google, not Yahoo, that's displaying the wrong P/E. Note that the P/E it is showing is 5.80 -- a decimal misplacement from 580 Note that CNBC shows the Earnings as 0.85 as well, and correctly show the P/E as 580 http://data.cnbc.com/quotes/BP.L A quick use of a currency calculator reveals a possible reason why EPS is listed differently at yahoo. 0.85 pounds is 1.3318 dollars, currently. So, I think the Yahoo EPS listing is in dollars. A look at the last 4 quarters on CNBC makes that seem reasonable: http://data.cnbc.com/quotes/BP.L/tab/5 those add up to $1.40." I spent a while looking for something similar a few weeks back and ended up getting frustrated and asking to borrow a friend's Bloombterg.   I wish you the best of luck finding something,  but I wasn't able to.   S&amp;P and Morningstar have some stuff on their site,  but I wasn't able to make use of it.  Edit: Also,  Bloomberg allows shared terminals.  Depending on how much you think as a firm,  these questions might come up,  it might be worth the 20k / year Investopedia has one and so does marketwatch    I've always used marketwatch, and I have a few current competitions going on if you want me to send the link    They recently remodeled the website so it works on mobile and not as well on desktop    Don't know anything about the investopedia one though TdAmeritrade offers this service for free using 3rd party company markit. From markit's site, below is their guarantee.  http://www.markit.com/product/markit-on-demand Markit On Demand delivers an average of two million alerts per day   through various technology platforms and via multiple channels,   including email, instant messages, wireless, RSS and Facebook.   Investors can subscribe to their alerts of choice, and Markit On   Demand guarantees that they will receive an alert within five minutes   of the event trigger for all price and volume alerts "I did a quick search, they have a $2B/5yr deal with google cloud.   Downside is Google is a competitor potentially, especially in the ad market.  Upside is SNAP revenue increased from $58M in 2015 to just over $404M in 2016.  I think in today's market, everyone wants to hold the next ""Amazon"" or ""Google"" stocks at their conception. Sure would be nice if you had a few thousand in Amazon at their IPO. So I think pure speculation is why they were trading above IPO price for so long. It could be the next biggest thing, or it could fail in 5 years we never know these things lol" I'm answering in a perspective of an End-User within the United Kingdom. Most stockbrokers won't provide Real-time information without 'Level 2' access, however this comes free for most who trade over a certain threshold. If you're like me, who trade within their ISA Holding each year, you need to look elsewhere.  I personally use IG.com. They've recently began a stockbroking service, whereas this comes with realtime information etc with a paid account without any 'threshold'. Additionally, you may want to look into CFDs/Spreadbets as these, won't include the heavy 'fees' and tax liabilities that trading with stocks may bring. "The answer to each of your questions is no. It is important to appreciate that the ""quoted"" ticker price may be delayed by say 15 minutes, and thus is not ""real-time.""" The biggest issue with Yahoo Finance is the recent change to the API in May. The data is good quality, includes both dividend/split adjusted and raw prices, but it's much more difficult to pull the data with packages like R quantmod than before.  Google is fine as well, but there are some missing data points and you can't unadjust the prices (or is it that they're all unadjusted and you can't get adjusted? I can't recall). I use Google at home, when I can't pull from Bloomberg directly and when I'm not too concerned with accuracy.  Quandl seems quite good but I haven't tried them. There's also a newer website called www.alphavantage.co, I haven't tried them yet either but their data seems to be pretty good quality from what I've heard. It looks like GOOG did not have a pre-market trade until 7:14 am ET, so Google Finance was still reporting the last trade it had, which was in the after-hours session yesterday. FB, on the other hand, was trading like crazy after-hours yesterday and pre-market today as it had an earnings report yesterday.