If you buy Tenaga today following the tariff hike news, and you happened to buy at RM7.10~RM7.20. Good luck!
Let's look at the history. On 5th June 2008, tariff hike announcement was made. On that day Tenaga was suspended from trading. On the 6th June 2008, it closed 23.8% higher. Since then, it's been going side way.