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GDX, Daily The issue starts from Aug 5th, 2003; and continues until May 23rd, 2006

Ticker GDX
From 2003-08-05 00:00:00
To 2006-05-23 00:00:00
Security Type Equity
Market USA
Resolution Daily
Status Waiting Review

Hi,

The data between the mentioned dates for this GDX (VanEck Vectors Gold Miners ETF) symbol probably should not be there (i.e. there should be no data prior to 2006-05-22).

The data explorer mentions 2006-05-22 as start date, which seems correct comparing with other sources.

However, the daily data returns points prior to this, which can clearly corrupt analysis done ni backtesting when this symbol is in universe.

 

 

https://www.quantconnect.com/data/file/equity/usa/daily/gdx.zip/gdx.csv
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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 QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect 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. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.


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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 QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect 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. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.


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