Newport Corp. to Join S&P; 400 MidCap Index

Newport Corp., an Irvine supplier of high-precision fiber-optic instruments, will be added to the Standard & Poor’s MidCap 400 Index after the close of trading today.

Newport will replace Cintas Corp., the maker of corporate-identity uniforms that is moving to the S&P; 500 Index, replacing Summit Bancorp. FleetBoston Financial Corp. is acquiring Summit in a transaction expected to close today.