RBC Capital Markets has released its latest social media survey, and the results suggest Snap Inc (NYSE: SNAP) is keeping its grip on the notoriously fickle teen user demographic.

Tesla Inc (Nasdaq: TSLA) secured its largest order for its recently unveiled electric semitractor-trailers on Tuesday when United Parcel Service, Inc. (UPS) announced an order for 125 trucks to add to its delivery fleet.

It has been a challenging year for many U.S. retail companies, but Wal-Mart Stores Inc(NYSE: WMT) has risen to the occasion. On Tuesday, Citi analyst upgraded Walmart to “buy” and said investors should expect more of the same from the stock in 2018.

Almost all of Wall Street is bullish on Apple Inc. (Nasdaq: AAPL), with buy/outperform ratings outnumbering sell/underperform ratings by a ratio of 32 to 1. Nomura analyst Jeffrey Kvaal may not be among the rare Apple bears, but he has left the ranks of the Apple bulls by downgrading the stock to “neutral” on Tuesday.

Just days after Walt Disney Co (NYSE: DIS) completed a blockbuster media deal for most of the TV and movie studio assets of Twenty-First Century Fox Inc (NYSE: FOXA), ESPN president John Skipper has announced his resignation due to substance addiction.

After three years of disappointment for Twitter Inc (Nasdaq: TWTR) investors, the tide may have finally turned for the company in 2017. Twitter stock jumped more than 8 percent on Monday after J.P. Morgan analyst Doug Anmuth upgraded the stock to “overweight” and named it one of the firm’s best stock ideas for 2018.

Toyota Motor Corp (ADR) (NYSE: TM) has announced a new aggressive electric vehicle initiative that includes rolling out 10 new fully EV models in the early 2020s. Toyota may not be the first to the electric vehicle market, but investors can rest assured that it will be a major player within the next decade.

After being one of the best-performing mega-cap stocks in the market throughout most of the year, Alibaba Group Holding Ltd (NYSE: BABA) stock is down 4.5 percent in the past month. MKM Partners analyst Rob Sanderson says there are three reasons why Alibaba shares have slumped, and investors should ignore all of them and buy BABA anyways.

Tesla Inc (Nasdaq: TSLA) has taken a lot of heat for its ugly balance sheet, its aggressive cash burn and its string of equity fundraising rounds. However, one Wall Street analyst says Tesla has a brighter financial future right around the corner in 2018.

One of the biggest stories on Wall Street this week will be at CSX Corporation (Nasdaq: CSX), where the company is mourning the sudden death of CEO Hunter Harrison.