tag:blogger.com,1999:blog-6593662323083860904.post2091651465596493942..comments2007-12-23T10:58:53.639+01:00Comments on hablando de bolsa: apuntes sobre opciones: call ratio backspreadWanjohttp://www.blogger.com/profile/06613101328451817352noreply@blogger.comBlogger0125