NEW YORK (TheStreet) -- A number of top executive appointments led the stock-related buzz on social media this week. In other news, Amazon (AMZN - Get Report) made a splash with its move in the "gig economy."
Here's our weekly round-up of the most discussed stocks on Twitter (TWTR - Get Report) and traditional media channels -- stock-related news that saw the highest levels of engagement among market experts and valid sources.
1. Ralph Lauren (RL - Get Report) : Ralph Lauren announced Wednesday that he is stepping down as CEO of his fashion company. Stefan Larsson, President of Old Navy and a former H&M executive, will be taking over the position.
3. NXT-ID Inc. (NXTD) : Biometric authentication company NXT-ID made headlines with their announcement of William Fields to its advisory board. Fields formerly served as CEO of Wal-Mart's (WMT - Get Report) retail stores division.
5. Tesla (TSLA - Get Report) : While speaking with a Danish TV station, Elon Musk said that he believes Tesla could have autonomous cars by 2018, though regulators could delay that. Tesla plans to have fully autonomous cars with a 745-mile range available by 2020.
7. Amazon.com: Amazon launched a new service called Amazon Flex which will allow independent couriers to deliver packages ordered for one-hour Amazon Prime Now delivery. The Uber-like service will offer drivers $18-$25 per hour.
10. DIRECTV (DTV - Get Report) : Following a change in exchange rates, DIRECTV may be devalued by $1.1 billionin Venezuela. AT&T, which acquired DIRECTV in July for $48.5 billion, is deciding on an exchange rate to use, which could alter the satellite TV provider's valuation in the country.