What happened

Shares of CBS (NYSE:CBS) headed lower last month after the company's merger with Viacom (NASDAQ:VIA) was widely panned by Wall Street. 

The reunion between the two companies had been expected by the market, but investors seemed to be suspicious that the new company would be able to compete in a fast-changing media industry. According to data from S&P Global Market Intelligence, the stock finished down 18% last month.

A television studio

Image source: Getty Images.

As you can see from the chart below, the stock fell sharply on Aug. 14 after the deal was announced.

CBS Chart

CBS data by YCharts.

So what 

CBS announced the news on Aug. 13. The all-stock deal unites the broadcast network -- which also owns Showtime, several other CBS-branded properties, and a partial stake in the CW -- with Viacom, the parent of Comedy Central, MTV, and Nickelodeon, and Paramount Studios. It creates a company with $28 billion in annual revenue. The move comes as both companies look to assert themselves in an industry rapidly consolidating and preparing for streaming, which relies on a deep content library to attract subscribers. 

Viacom CEO Bob Bakish said the deal allows the new enterprise to "become one of only a few companies with the breadth and depth of content and reach to shape the future of our industry." Together the combined company will be the market share leader in live TV viewership with 22%. 

The market initially liked the news as the stock rose on Aug. 13, finishing up 1.4%. However, sentiment changed the following day when analysts began to weigh in on the deal. A number of them downgraded the stock and suggested that CBS was trying to grab a piece of Disney's magic in its own streaming announcement earlier, but doesn't have the content to match.  The stock lost 8% on Aug. 14.

Now what 

Traditional media stocks like CBS have fallen out of fashion as investors have jumped on streaming plays like Netflix and Roku, but there's a solid argument for CBS being an attractive value stock. Traditional broadcast and cable companies continue to generate solid profits and cash flow, and the threat of cord-cutting is often exaggerated as there are still many more U.S. subscribers to pay TV, which includes cable and satellite, than there are for Netflix. 

CBS may be operating from a position of weakness, but a tie-up with Viacom makes sense since it will only make its streaming services like CBS All Access more appealing to viewers.

Still, it's up to the new company to persuade investors that the merger is a smart move. Until it does, or its results meaningfully change, expect the stock to remain at its current levels.