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@kairos Hi,
thanks for pointing this out, we are working on it, it will be fixed as soon as possible.
The problem is, that for some dates prior to 2014 we don't get OHLC prices at all for most assets (all NaNs, so is_liquid is NaN too). We have already reported it to our data provider. Anyway, the clean() function should work properly.
Best regards
@omohyoid Hi,
To prevent potential forward-looking behavior in the strategy, we use day-by-day submission processing. This means that when defining weights for a specific date, only data up to that date is available. Please ensure that data used by your model is handled correctly within the strategy.
Any use of future data for a specific date will produce different results than expected, and the strategy will not be eligible for competition.
Additionally, using external data sources or data not provided by Quantiacs is not allowed.
Regards
Dear @darwinps,
The difference is that you call filter method in your code where you see this warning. When that method is called, it calculates stats internally at that point in time, so that's when you actually see the warning, since at that time, the liquidity filter hasn't been applied.
The final stat calculation that you are doing in your code (after the liquidity filter) is not giving any warnings which is expected behavior.
Best regards
Dear @omohyoid,
Currently we are facing some data issues, the error is not caused by changes in qnt library. At the moment, only current index members of S&P500 index are available, but Nasdaq100 stocks are temporarily unavailable. Sorry for the inconvenience, we are working on a solution.
Dear @darwinps,
This discrepancy is normal due to different ways how the stats are calculated at the beginning of the in sample period. Over a longer period, these statistics should become very similar or identical.
Thanks for bringing this up, and if you notice some big discrepancies in the future, please report that to us.
Best regards
@carogate Hi, at the moment unfortunately not, sorry...
Hello quants! The Q22 contest started. You can develop trading systems on the S&P500 stocks.
Please check the templates and the examples and read the documentation:
https://quantiacs.com/documentation/en/
The submission phase will last until end of January 2025, and the live evaluation until end of May 2025.
@carogate Hi, please take a look at this example:
https://github.com/quantiacs/strategy-predict-NASDAQ100-use-SPX/blob/master/strategy.ipynb
@sun-73 Hi, there is no limit to the maximum limit to the number of stocks. The cap of 10% stays the same. Call documented in:
https://quantiacs.com/documentation/en/data/stocks.html#stocks-s-p500
@omohyoid Hi, we do not have such calls, sorry