Twitter has become a micro blogging service with a macro price tag after seeing its valuation double since December to $8bn on the back of a tripling of daily traffic in a year.
The latest price point was reached after a $400m investment by DST Global, reflecting huge expectations in the firm even though it remains loss making.
Twitter is in process of preparing for a possible initial public offering and will use half the money to buy back shares with the reaminder going toward improving services to boost ad revenue.
Ina blog post Twitter said: "We have the opportunity to expand Twitter's reach with a significant round of funding led by the venture firm DST Global, with the participation of several of our existing investors. We will use these resources to aggressively innovate, hire more great people and invest in international expansion."