This spam is extremely overvalued

Is it just me, or am I getting a silly number of these mails? So far this month, I've had 106 spam mails promoting an American stock that I'm never going to buy. That's 13% of all the spam delivered to me in July (819 mails so far)...

Annoyingly, a good percentage of them have got through my spam filter, since the spam content is included as an image, rather than as text which can be properly analysed and binned.