S&P 500 (^GSPC)

Abstract. In this chapter we will calculate numeric summary measures on the rate of return of the S&P , Amazon, and Walmart. Statistical numerical numbers look at data in five different ways.

Well, morale's still pretty good, but Aesop's fables do come into play

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Last week I received an email from Quandl stating: On June 30, , we will remove two databases from Quandl: GOOG and YAHOO. Unfortunately, the source data will no longer be available to us, so we cannot continue to offer it on the site.

Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Search Answers Clear Filters. Search Support Clear Filters. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. Asked by Richard Richard view profile.

Latest activity Edited by dpb dpb view profile. Unfortunately it does not include the millennium in the date. How do I fix this?

Stephen Cobeldick Stephen Cobeldick view profile. Direct link to this comment: What features or commands are you using? How are you calling them? If you don't actually give us details about you are doing then we have to rely on our crystal balls to fill in the details, which are notoriously unreliable. Richard Richard view profile. Hi Stephen, I have downloaded data from https: Which has dates like this: Then I import it like this: Direct link to this answer: Answer by dpb dpb view profile.

I presume the newer datetime class has its equivalent but I'm at Rb here so can't test. You can read doc as readily as I. Walter Roberson view profile. Answer by Walter Roberson Walter Roberson view profile. If you are using Rb or later, and you wish to continue using datetime objects, then one approach would be to use. I dug thru the doc at some length, Walter, and found another for setvaropts that eventually led via links on subsequent pages to the formatting scheme for datetime.

Any suggestions for alternate data before they go dark? So that in turn, Google and Yahoo probably imposed on Quandl to remove those services and stop deriving commercial benefit illegally from them—which they had no choice but to comply.

XigniteGlobalHistorical is a commercial service, not free but that provide even higher quality data and features such as automatic adjustments for corporate actions splits, cash dividends, spinoffs, bonus shares, scrips and stock distributions etc. Check out Xignite API covering equities and ETFs trading on more than 50 global exchanges and history as far back as for US securities and for global exchanges.

Yes, we got that email too. We're working on emailing live traders who will be affected and we would like to add a warning to algos that use the dataset. The good news is that we have the same dataset from a different source through Quandl and the API is identical, so you should just be able to swap your import statements. The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

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All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. There are NO startup deals like with Quandl premium data and no discount of any meaning for using only a few hundred or thousands of stocks. Vijay Choudhary Not sure if you work for Xignite but you won't get many takers at those sort of prices.

Consider start up deals like Quandl offer through Zaks and others. You can see the datasource here: This is well beyond the June 30th, notification and no warnings showed up.

It affected a Live Trading algorithm of mine and hopefully this post can be a warning to anyone else who might be affected. I wonder if it has to do with Yahoo changing their API. A lot of 3rd party applications that grabbed their data from Yahoo are unable to update since May 15th. I wish someone had more details as to what is going on with this retail data.

Yahoo could be blamed on Verizon ownership, but that doesn't explain why the GOOG database is being deleted from Quandl.

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