Twitter Tumbles on Another Exec's Departure, Micron Tanks on Lower Price Target

NEW YORK (TheStreet) -- Twitter (TWTR) fell after a high-level executive announced his resignation, a move that comes within weeks of another announcement the CEO would be leaving. Micron Technology (MU) tanked after an analyst cut its price target. Facebook (FB) slipped after announcing its opened its first office in Africa.

Twitter fell 3% to close at $34.21.

The social networking company edged lower after Rishi Garg, Twitter's vice president of corporate development and strategy, announced his resignation in a tweet roughly 15 minutes before the markets closed Friday. In his announcement, Garg said simply, "After an amazing ride as Twitter's VP Corporate Development and Strategy, I'm saying farewell today."

Garg, who joined Twitter a little over a year ago, is leaving to pursue other projects, according to a Re/code report. Twitter's chief financial officer, Anthony Noto, responded to Garg's tweet by wishing him well and saying to count him in for a seed funding round.

Twitter's former VP Garg oversaw the company's acquisitions of Periscope, a live streaming video business, and also advertising company Niche, according to a report in Fortune. The move also comes two weeks after Twitter announced CEO Dick Costolo would be stepping down.

Micron Technology tanked 4.7% to end the session at $18.73.

The semiconductor maker fell after Bernstein analyst Mark Newman cut Micron's price target to $28 a share from $45 a share, according to a report in Benzinga.

Newman, according to Benzina, stated, "Micron's DRAM cost guidance of up low single digits confirms our worst nightmares on their problematic 20nm DRAM shrink. DRAM margins will fall substantially in FQ4'14 and the stock is dead money until the company can prove that the shrinks are back on track."

He further noted that the issues surrounding Micron's 20nm DRAM shrink is expected to hit Micron, in particular, rather than the wider chip market.

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