Buying Worst Performing positions in my portfolio

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Buying Worst Performing positions in my portfolio

edited

I am new to Quantopian and coding/algorithm trading. I am trying to make an algorithm that will recognize and purchase the worst performing stocks in my portfolio (preferably one share at at time) if the uninvested cash balance it enough to buy 1 share of the worst performing stock.

For example, my portfolio has 250 different stocks. If i have 100 shares of AAPL and it is the worst performing stock with -10.1% return followed by VZ at -10.05% return, the algorithm should be able to recognize AAPL as the worst performing position and buy 1 share of AAPL. If, after the purchase, the new AAPL return is now higher than -10.05% (let's say -10.02) and now VZ is the worst performer at -10.05%, then the Algorithm should now buy 1 share of VZ. But if the new AAPL return is still the worst performing in the portfolio( let's say the new return after the purchase of 1 additional share is -10.07% vs the 2nd worst performer VZ at -10.05%), then the algorithm should place another order for 1 additional share of AAPL and repeat this step until AAPL is no longer the worst performer. Then the Algorithm would now keep buying the new worst performer until it is no longer the worst performing.

Note: The algorithm should NEVER sell all stocks. Just buying the worst performer.

The logic is for the algorithm to always focus on buying the worst performing stock in the entire portfolio al long as my portfolio has enough cash to buy one stock of the worst performing position.

Anyone got an idea how to code this?

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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.