Yeah mate, I mentioned this in the other thread actually yesterday. Here's what happened:
United have an earnings report this Friday before the market opens, so sometime before 2:30pm UK time. What usually happens before a company reports earnings is the stock gets run up and then drops significantly just before the market closes on the day before earnings, we'll probably see this happen on Thursday night. It's called 'playing the earnings', and it's incredibly stupid to hold a stock through earnings if you don't plan on holding for years.
That tweet in-particular is referring to someone dropping $230k on stock options that expire next month for a stock that's at $14 but they believe will move closer to $17 by then. A positive earnings or news catalyst would do that.
Again though, what's unusual is the amount of volume Man Utd is getting this week. Large volume spikes on the options and the stock commons. So it's one of three things:
1. Traders are playing the earnings and nothing significant is going on right now.
2. There's a positive earnings report on the way. (insider trading)
3. Someone knows something about a new investor that will be mentioned during the earnings call on Friday morning (insider trading)
As always, we'll know by the weekend what's really going on.