For those of you who trade SPXPM options, on May 1 they will convert to SPXW options. So regular SPX will expire in the morning (monthly only) and all SPXW options (including the former SPXPM) will expire in the afternoon. http://www.cboe.com/framed/PDFframe...sion+of+SPXPM+Options+to+Symbol+SPXW+-+Update