Twitter's share price is plunging after two key figures resigned earlier this week, prompting a market analyst to issue a research note calling the company 'toast'.

Yesterday, Twitter's chief technology officer Adam Messinger and Josh McFarland, vice president of product, announced they would both be leaving the company.

The company's share price closed at $17.92 (£14.52) on Tuesday, and traded down again to close at $17.08 (£13.84) on yesterday's close.

As of 12:00 GMT (7:00 EST), the stock was down again 0.64 per cent day-on-day at $16.97 (£13.76).

Scroll down for video

In the past five days, the stock has fallen $2.05 (£1.66), or 10.7 per cent (graph pictured)

TWITTER'S PLUNGING STOCK PRICE The company's share price closed at $17.92 (£14.52) on Tuesday, and traded down again to close at $17.08 (£13.84) on yesterday's close. A high profile analyst claims the stock is not even worth $10 (£8,11). If the stock price was to drop to $10 (£8.11), that would represent a 41 per cent decrease from its closing price on Wednesday. In the past five days, the stock has fallen $2.05 (£1.66), or 10.7 per cent. As of 12:00 GMT (7:00 EST), the stock was trading down again 0.64 per cent day-on-day at $16.97 (£13.76). Advertisement

On Tuesday Twitter's CTO Adam Messinger tweeted: 'After 5 years I’ve decided to leave Twitter and take some time off.'

This is the latest in a string of high-profile executive departures.

Messinger had been working with Twitter for five years and became the CTO in March 2013.

Prior to joining Twitter in 2011, he was vice president of development at Oracle.

Josh McFarland, vice president of product at Twitter, also said on Tuesday that he would leave the company to join Silicon Valley venture firm Greylock Partners.

Trip Chowdhry, managing director of equity research at California-based Global Equities Research, renowned for analysis of technology stocks, issued a note on Tuesday saying the company was 'toast'.

'Many investors were foolishly building (an) investment thesis based on complete stupidity,' Chowdhry wrote, CNBC reports.

He added that the price was not even worth 'a $10 stock.'

If the stock price was to drop to $10 (£8.11), that would represent a 41 per cent decrease from its closing price on Wednesday.

San Francisco-based Twitter has faced a string of departures, including in its product team, which has had three heads in less than a year. Stock price over the past year, pictured

After 5 years I’ve decided to leave Twitter and take some time off. Grateful to @jack for the opportunity and to my team for shipping. — Adam Messinger (@adam_messinger) December 20, 2016 In the past five days, the stock has fallen $2.05 (£1.66), or 10.7 per cent.

The company's share price closed at $17.92 (£14.52) on Tuesday, and traded down 4.6 per cent yesterday to close at $17.08 (£13.84) on Wednesday's close.

Chowdhry said the company's data is 'horrible'.

'If data quality is bad, ad targeting is bad, and if ad targeting is bad, advertisers are not happy, and hence monetisation will remain challenging for Twitter,' he added.

San Francisco-based Twitter has faced a string of departures, including in its product team, which has had three heads in less than a year.

Engineering Vice President Ed Ho will now take over all product and engineering and report directly to Chief Executive Jack Dorsey, Recode reported, citing people familiar with the restructuring.

'We're taking steps to streamline and flatten the organization by elevating our engineering, product and design functions, with each area now reporting directly to Jack,' a company spokesperson said in an email.

Twitter's share price is plunging after two key figures resigned earlier this week, prompting a market analyst to issue a research note calling the company 'toast'. Stock image

As chief technology officer, Messinger was responsible for engineering, product development, and design at the microblogging company, amid efforts to find new products and features to grow its user numbers.

No one individual was essential, but the fact that they all left should be concerning, especially since Dorsey is splitting his time between Square Inc and Twitter, Wedbush Securities Inc analyst Michael Pachter said.

Twitter's Chief Operating Officer Adam Bain left the company last month, handing over the reins to Chief Financial Officer Anthony Noto.