Social Media Newsfeed: Instagram Event Today | Facebook Added to S&P 500

Instagram to make an announcement in New York City today. Facebook is added to S&P 500. These stories, and more, in today's Morning Social Media Newsfeed.

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Instagram’s Big Mystery Event: What to Expect (Mashable)
Instagram has something big up its sleeve. The photo-sharing platform and Facebook subsidiary will make a rare appearance in New York City today for an unveiling. TechCrunch It is preparing to launch a new messaging service on its platform possibly as soon as its event this Thursday — TechCrunch has heard from a variety of sources. What we’ve also heard, however, from a few sources, is a very interesting rumor: Instagram’s messaging feature will feature messages that will disappear over time. CNET The social network says it now has 150 million active users worldwide. Last month, the service — which sold itself to Facebook for $1 billion last year — announced that it was starting to run advertisements in an effort to monetize its business. Digital Journal Whether Instagram will indeed unveil a private messaging application or a printing service, their ability to keep the event topic under wraps so well for so long is a highly sought-after skill, one from which mobile device giants such as Samsung could learn, considering their announcements and press events are always leaked. Instagram has unveiled numerous features previously, though, many of which were not accompanied by a press event — Instagram’s photo map sharing feature, for example.

Facebook Added To S&P 500 and S&P 100 Indexes; Stock Jumps More Than 4 Percent in After-Hours Trading (IBT)
Standard & Poor’s on Wednesday said that the social networking giant, Facebook, will be joining its S&P 500 and S&P 100 stock indexes after close of trading on Dec. 20, more than a year after its stormy initial public offering. Facebook’s entry to the S&P 500 index could help boost the company’s stock, which is steadily recovering from a rocky start and a subsequent drop in price after its much-hyped, and controversial, IPO in May 2012.

LinkedIn Announces the Top 10 Overused Buzzwords of 2013 [Infographic] (SocialTimes)
LinkedIn released its annual list of the top 10 overused buzzwords on Wednesday. According to the study, which focused on English-language profiles worldwide, “responsible” was by far the most used word of 2013.

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Snapchat Reveals Coatue Management is the Investor in its $50M Funding (VentureBeat)
Snapchat has officially raised $50 million in its third round of funding, according to a Snapchat spokesperson who confirmed the funding with VentureBeat, saying Coatue Management is the newest investor. The spokesperson told VentureBeat that the money will go toward “growing the business,” which is about as clear as saying I use my salary to pay for stuff.

Facebook’s New Like, Share Buttons Now Available to All Pages; Width Can Be Set on Embedded Posts (AllFacebook)
Facebook announced Wednesday that the redesigned like and share buttons it introduced last month are now available to all pages, and that page administrators can now adjust the width of embedded posts to anywhere from 330 pixels to 750 pixels.

Spotify’s Daniel Ek on Competition, Controversy and Crossing Over Into the Mainstream (AllThingsD)
Spotify is rolling out a free mobile option. It’s a move that will make the service more competitive with rivals like Pandora, which has been free on phones for years.

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Want More Retweets? Use Hashtags, Photos, Exclamation Marks (and Tweet in CAPS) [Study] (AllTwitter)
Use hashtags – in fact, the more the merrier. Always include a photo with your tweet, as it helps you stand out. Exclamation marks at the end of a sentence can pay dividends, as can actually asking for your followers to retweet your message.