This is an announcement for the paper "Extrapolation of vector valued rearrangement operators" by Stefan Geiss and Paul F. X. Mueller. Abstract: We study the extrapolation properties of vector valued rearrangement operators acting on the normalized Haar basis in $L^p_X .$ Archive classification: math.FA Mathematics Subject Classification: 46B42, 46B70, 47B37 The source file(s), geiss_mueller.tex: 60833 bytes, is(are) stored in gzipped form as 0902.1962.gz with size 18kb. The corresponding postcript file has gzipped size 130kb. Submitted from: pfxm@bayou.uni-linz.ac.at The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/0902.1962 or http://arXiv.org/abs/0902.1962 or by email in unzipped form by transmitting an empty message with subject line uget 0902.1962 or in gzipped form by using subject line get 0902.1962 to: math@arXiv.org.