Perpetually-growing universe when using pipeline?

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Perpetually-growing universe when using pipeline?

Simon Thornington

edited Oct 12, 2015

I can't put my finger on how it's happening, but in one of my test algos, it seems like perhaps the universe is growing and growing until at some point after a year of simulation, I start getting stocks missing in my history() results, and things go downhill quickly from there (in my code). Anyone noticed anything like this?

I am trying to keep a historical log of all trades throughout history, in a DataFrame in my context, so that I can calculate un-leveraged theoretical performance in between rebalancings, for some equity-curve risk analysis/deleveraging, but having a column in a DataFrame shouldn't cause that sid to require a slot in the universe forever, should it?

Simon.

UPDATE: never mind, it was my bug :)

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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 Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. 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.