Where I can find S&P 500 stock data history?
I assume you're after a price time series and not a list of S&P 500 constituents?  Yahoo Finance is always a reasonable starting point. Code you're after is ^GSPC: https://finance.yahoo.com/quote/%5EGSPC/history?p=^GSPC  There's a download data button on the right side.
"This is the best tl;dr I could make, [original](http://www.aei.org/publication/warren-buffett-wins-1m-bet-made-a-decade-ago-that-the-sp-500-stock-index-would-outperform-hedge-funds/) reduced by 91%. (I'm a bot) ***** &gt; MP: Specifically, Buffett offered to bet that over a ten-year period from January 1, 2008 to December 31, 2017, the S&amp;P 500 index would outperform a portfolio of funds of hedge funds when performance is measured on a basis net of fee.  &gt; A fund that tracks the S&amp;P 500 fund might have an expense ratio of as little as 0.02%. MP: The chart above shows the annual returns on the S&amp;P 500 index and the average annual returns on a comprehensive index of thousands of hedge funds maintained by Barclay over the period of Buffett&amp;#039;s bet: From 2008 through August of this year.  &gt; Funds of hedge funds accentuate this cost problem because their fees are superimposed on the large fees charged by the hedge funds in which the funds of funds are invested.   ***** [**Extended Summary**](http://np.reddit.com/r/autotldr/comments/71a3oo/warren_buffett_wins_1m_bet_made_a_decade_ago_that/) | [FAQ](http://np.reddit.com/r/autotldr/comments/31b9fm/faq_autotldr_bot/ ""Version 1.65, ~213478 tl;drs so far."") | [Feedback](http://np.reddit.com/message/compose?to=%23autotldr ""PM's and comments are monitored, constructive feedback is welcome."") | *Top* *keywords*: **fund**^#1 **hedge**^#2 **index**^#3 **bet**^#4 **fee**^#5" Victor, Yes the drop in price does completely cancel the dividend at first. However, as others have noted, there are other forces working on the price as well. If dividends were pointless then the following scenario would be true: Let's assume, hypothetically, two identical stocks, only one of which pays a 2% annual dividend quarterly. At the end of the year we would expect the share price of the dividend stock to be 2% lower than the non-dividend stock.  And an equal investment in both stocks would yield exactly the same amount of money. So that is a hypothetical, and here is real market example: I compared, i.e. took the ratio of Vanguard's S&P 500 ETF (VOO) closing price to the S&P 500 Index closing price from sep 9, (2010-2014), after accounting for the VOO 2013 split. The VOO pays a quarterly dividend(about 2%/year), the S&P is an index, hence no dividend. The VOO share price, reduced each quarter by the dividend, still grew more than the S&P each year except 2012 to 2013, but looking at the entire 4yr period the VOO share price grew 80.3987% while S&P grew 80.083% (1/3 of 1% more for VOO). VOO does drop about 1/2% relative to S&P on every ex date, but obviously it makes it up. There are other forces working on VOO. VOO is trade-able, therefore subject to supply/demand pressures, while the S&P 500 is not. So for the VOO ETF the data does not indicate pointless dividends but instead implies dividends are free money. StockCharts.com supports this.  S&P500 for last 1244 days (9/8/2010) shows 90% growth http://stockcharts.com/freecharts/perf.php?%24SPX while VOO for last 1244 days shows 105% growth http://stockcharts.com/freecharts/perf.php?VOO "The S&P 500 index is maintained by S&P Dow Jones Indices, a division of McGraw Hill Financial. Changes to the index are made periodically, as needed.  For Facebook, you'll find it mentioned in this December 11, 2013 press release (PDF).  Quote: New York, NY, December 11 , 2013 – S&P Dow Jones Indices will make the following changes to the S&P 100, S&P 500, MidCap 400   and S&P SmallCap 600 indices after the close of trading on Friday,   December 20: You can find out more about the S&P 500 index eligibility criteria from the S&P U.S. Indices methodology document (PDF).  See pages 5 and 6: Market Capitalization - [...] Liquidity - [...] Domicile - [...] Public Float - [...] Sector Classification - [...] Financial Viability - Usually measured as four consecutive quarters of positive as   reported earnings. [...] Treatment of IPOs - Initial public offerings should be seasoned for 6 to 12 months   before being considered for addition to an index. Eligible Securities - [...]   [...]   Changes to the U.S. indices other than the TMIX are made as needed,   with no annual or  semi-annual reconstitution. [...] LabCorp may have a smaller market cap than Facebook, but Facebook didn't meet all of the eligibility criteria – for instance, see the above note about ""Treatment of IPOs"" – until recently. Note also that ""Initial public offerings should be seasoned for 6 to 12 months"" implies somebody at S&P makes a decision as to the exact when. As such, I would say, no, there is no ""simple rule or formula"", just the methodology above as applied by the decision-makers at S&P." "Here is, from Yahoo Finance, the S&P 500 over the last ~60 years (logarithmic scale):  The behavior since ~2000 has been weird, by historical standards. And it's very easy, looking at that graph, to say ""yes! I would have made so much money had I invested in March '09!"". Of course, back in March '09, it wasn't so clear that was the bottom. But, yes, over the last 10 years or so, you could have made more money by adopting a rule that you'll accumulate cash in a FDIC (or similar) insured savings account, and dump it into an S&P index fund/ETF when the index is n% off its high. Of course, if you look at the rest of the chart, that strategy looks a lot less promising. Start in the early 80's, and you'd have held cash until the crash in 2000. Except for the recent weirdness, the general trend in the S&P 500 (and stock markets in general) has been upward. In other words, to a first-order approximation, the S&P 500 is always at an all-time high. That's just the general trend." "This page from simplestockinvesting.com gives details of total returns for the S&P500 for each decade over the last 60 years, including total returns for the entire 60 year period. It is important to understand that, from an investors point of view, the total return includes both the change in index value (capital gain) plus dividends received.  This total then needs to be adjusted for inflation to give the ""total real return"". As noted in the analysis provided, 44% of the total return from the S&P500 over the last 80 years comes from dividends.  For the DowJones30, this site provides a calculator for total returns and inflation adjusted total returns for user selected periods. Finding comparable analysis for the NASDAQ market is more difficult.  The NASDAQ market site provides gross values for total returns over fixed periods, but you will then need to do the arithmetic to calculate the equivalent average annual total returns.  No inflation adjusted values for ""real"" returns are provided, so again you will need to combine inflation data from elsewhere and do the arithmetic." I dont know if this data is available for the 1980s, but this response to an old question of mine discusses how you can pull stock related information from google or yahoo finance over a certain period of time. You could do this in excel or google spreadsheet and see if you could get the data you're looking for.  Quote from old post: Google Docs spreadsheets have a   function for filling in stock and fund   prices. You can use that data to graph (fund1   / fund2) over some time period. The official source for the Dow Jones P/E is Dow Jones.  Unfortunately, the P/E is behind a pay-wall and not included in the free registration. The easiest (but only approximate) solution is to track against an equivalent ETF.  Here's  a list of popular indexes with an equivalent ETF. Source I was going to comment above, but I must have 50 reputation to comment. This is a question that vexes me, and I've given it some thought in the past. Morningstar is a good choice for simple, well-organized financial histories.   It has more info available for free than some may realize.  Enter the ticker symbol, and then click either the Financials or the Key Ratios tab, and you will get 5-10 years of some key financial stats.  (A premium subscription is $185 per year, which is not too outrageous.) The American Association of Individual Investors (AAII) provides some good histories, and a screener, for a $29 annual fee. Zacks allows you to chart a metric like EPS going back a long ways, and so you can then click the chart in order to get the specific number.  That is certainly easier than sorting through financial reports from the SEC.  (A message just popped up to say that I'm not allowed to provide more than 2 links, so my contribution to this topic will end here.  You can do a search to find the Zacks website.  I love StackExchange and usually consult it for coding advice.  It just happens to be an odd coincidence that this is my first answer.  I might even have added that aside in a comment, but again, I can't comment as of yet.) It's problem, however, that the universe of free financial information is a graveyard of good resources that no longer exist.  It seems that eventually everyone who provides this information wants to cash in on it.  littleadv, above, says that someone should be paid to organize all this information. However, think that some basic financial information, organized like normal data (and, hey, this is not rocket science, but Excel 101) should be readily available for free.  Maybe this is a project that needs to happen.  With a mission statement of not selling people out later on. The closest thing out there may be Quandl (can't link; do a search), which provides a lot of charts for free, and provides a beautiful and flexible API.  But its core US fundamental data, provided by Sharadar, costs $150 per quarter.  So, not even a basic EPS chart is available there for free. With all of the power that corporations have over our society, I think they could be tabulating this information for us, rather than providing it to us in a data-dumb format that is the equivalent of printing a SQL database as a PDF!  A company that is worth hundreds of billions on the stock market, and it can't be bothered to provide us with a basic Excel chart that summarizes its own historical earnings?  Or, with all that the government does to try to help us understand all of these investments, they cannot simply tabulate some basic financial information for us? This stuff matters a great deal to our lives, and I think that much of it could and should be available, for free, to all of us, rather than mainly to financial professionals and those creating glossy annual reports. So, I disagree that yet another entity needs to be making money off providing the BASIC transparency about something as simple as historical earnings. Thank you for indulging that tangent.  I know that SE prides itself on focused answers.  A wonderful resource that I greatly appreciate.