Twitter shares soared yesterday, a day after Goldman Sachs CEO Lloyd Blankfein tweeted a photo of himself with Twitter CEO Jack Dorsey at the tech company's HQ in San Francisco, Bloomberg reports.

Why it matters: "Disney had explored the possibility of buying Twitter when the company considered selling itself last year ... Goldman Sachs was said to have advised Twitter in those discussions."

• Blankfein was cited by several traders as a factor in the stock's rally, amid rekindled merger speculation on the day Walt Disney Co. announced its Fox deal. Twitter, which has struggled as a business despite its hold on the culture, rose as much as 7.3%, reaching the highest in more than a year.
• "Blankfein was at the social network's offices as part of an ongoing question-and-answer series with well-known users."