Shares in Reuters, the struggling news and financial information provider, have surged to more than double the level they were at three months ago.
In mid-March shares in the FTSE 100 firm dropped below £1 for the first time in the company's 10-year history on the stock market.
There has been a series of substantial rises since then, as investors warmed to restructuring plans.
Reuters has been hit hard over the past few years by the collapse in technology spending, sharp stock market falls and increased competition from competitors such as Bloomberg and Thomson.
Its biggest customers are investment banks and other financial institutions, which have been among the worst affected by stock market falls.
And several large investments such as Instinet, an electronic brokerage, have struggled to justify themselves in light of the dot.com and stock market crashes.
The restructuring plans involve thousands of job cuts and a refocusing on the most profitable parts of the business.
On Friday, Reuters shares finished the day up another 6% to 194 pence.
This compared with a low of 95.5p touched on 12 March.
At the height of the dot.com boom, in early 2000, Reuters shares were worth more than £15 apiece.