Markets Live: Vocus plunges on second guidance downgrade
![</p>](/web/20170503181203im_/http://www.smh.com.au/content/dam/images/1/3/x/m/s/v/image.related.landscape.120x80.gvxsy9.png/1493795218901.jpg)
The sharemarket's seemingly relentless rise towards the elusive 6000-point threshold suffered a setback on Wednesday, as heavy selling in the big banks and major miners handed the ASX its worst session in six weeks.