Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: Groupon 1_DAY_RETURN: -0.0284237726098192 2_DAY_RETURN: -0.0180878552971576 3_DAY_RETURN: -0.0180878552971576 7_DAY_RETURN: -0.0465116279069767
The stock shows a consistent negative return trend over the specified periods.