With Twitter's pending IPO, concerns are being raised about a 'tech bubble' coupled with flashbacks to Facebook's IPO mishap. Would you invest in Twitter?
5 Nov 2013: Charles Arthur: Did BlackBerry just get too old? No – the smartphone company had opportunities to adapt and survive, but it took the wrong direction
3 Nov 2013:
This week's IPO is eagerly awaited, but Twitter must win the battle with those investors who think it is doomed to remain a 'niche' site, writes Juliette Garside