After a big-bang listing, Twitter shares seem to be losing its fizz while social media rivals Facebook and LinkedIn are holding the fort amid portfolio churn by investors.

In a dream debut, microblogging site Twitter's stock popped up on the New York Stock Exchange debut on November 7 and closed with 73 per cent gain for investors who subscribed to its initial public offering price of $26 a piece. The firm, which lets people post 140-character messages, raised $1.8 billion in a keenly watched IPO.

Skeptics were left speechless as the valuation of the firm, which is yet to make profit after seven years of existence, soared to over $25 billion even as tech firms like Facebook and LinkedIn ended 2-4 per cent lower that day. However, the momentum in Twitter shares seem to be falling already and analysts have begun to question the company's current valuations vis-a-vis Facebook and LinkedIn, arguing on better margins and larger size for the two.

After closing at $44.90 on November 7, Twitter share price has failed to reach new highs and has entered December with a last traded price of $41.57 apiece -- an over seven per cent drop from first day closing.