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Bad instruments in coarse universe selection (example: ZXZZT)

I am using the algorithm framework, and specifically a coarse universe selection model to select the securities.
I am not interested in getting fundamentals data, but if I don't filter out the securities using HasFundamentalsData I get weird instruments that make the results of the backtests useless.
For example, I've found out that the instrument ZXZZT:US, included in the unfiltered coarse universe, is a test instrument used on NASDAQ (seeĀ https://www.bloomberg.com/quote/ZXZZT:US ).
How do I filter out such "fake" instruments without relying on HasFundamentalsData?
(Note: I explicitly want to avoid using HasFundamentalsData as this will cause the live algorithm to be updated with data once a day, which is an annoying limitation considering I am not using fundamentals in the algorithm)

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Hi Liu,

I'm not sure exactly how to find "fake" securities, but since you don't want daily updates you can use HasFundamentalData with a Scheduled Universe Selection model to ensure that Universe Selection only updates when you want it to, assuming that you want it to update less frequently than daily (note that even using just Coarse Universe Selection will cause daily updates).

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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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