if EML are going ex divi for all shareholders on 30th doesn't that mean you woyld have to hold by COB on 29th? the SP has plummeted to take into account the special divi but hasn;t it plummeted too early?

End-of-day Market Overview

Alex, The ex-dividend date is two business days before the record date: If the record date is on Friday, the ex-dividend date is on Wednesday, so the sp drop is in line with that.