Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: Siemens 1_DAY_RETURN: -0.005675576711827 2_DAY_RETURN: -0.0073233247894543 3_DAY_RETURN: -0.0109849871841815 7_DAY_RETURN: -0.0054924935920907
The stock shows a consistent negative return trend over the specified periods.