Weak, semi-strong, and strong form efficiency.
• Investors seek to sell Lyft shares after learning the company is struggling to attract drivers.
• I notice crypto tends to go down on weekends so I buy on the weekends and then sell during the weekdays.
Does the first bullet point above represent weak, semi-strong, or strong form efficiency? Does the second bullet point above represent weak, semi-strong, or strong form efficiency? Which of the two bullet points should not occur if markets are perfectly efficient?