** Property and casualty insurer's shares AGO.N rise 8.4%
to $23.78 premarket; set for its best day in nearly four months
** Co to replace Simpson Manufacturing SSD.N in the S&P
600 small cap index before markets open on Oct. 7
** SSD to replace Delphi Technologies DLPH.N in the S&P
400 mid cap index; DLPH to be acquired by BorgWarner Inc BWA.N
soon, pending final conditions urn:newsml:reuters.com:*:nPn4M1cYya
** Up to Thursday's close, AGO down ~55% YTD
(Reporting by C Nivedita in Bengaluru)
((C.Nivedita@thomsonreuters.com;))