Compare the stock returns over 1, 2, 3, and 7 days after being mentioned in the tweet. Highlight any significant patterns or trends.
STOCK: Viacom 1_DAY_RETURN: 0.01952580195258 2_DAY_RETURN: 0.01952580195258 3_DAY_RETURN: 0.01952580195258 7_DAY_RETURN: -0.0278940027894002
The stock shows a consistent negative return trend over the specified periods.