The stock market was narrowly mixed on Monday, with declines for the Nasdaq and S&P 500 throwing some cold water on small gains for the Dow Industrials. Investors continued to try to foresee the impact of a new administration taking over in 2017 on various parts of the market. Yet despite mixed sentiment across various sectors, some stocks fell sharply, and Anheuser-Busch InBev (NYSE:BUD), TransDigm Group (NYSE:TDG), and Dynavax Technologies (NASDAQ:DVAX) were notable decliners on the day. Below, we'll look more closely at these stocks to tell you why they did so poorly.

Image source: Anheuser-Busch InBev.

Anheuser-Busch gets a downgrade

Anheuser-Busch InBev fell 4% in the wake of receiving an analyst downgrade from HSBC. The analyst company said that the beer-maker could have to deal with more difficult conditions not just within the U.S. market but also in key international markets like Brazil. Moreover, with the election results creating some uncertainty about future prospects, HSBC decided to cut its price target on the beer-maker by about 15%. Going forward, Anheuser-Busch will have to demonstrate its ability to deal with geopolitical changes and continue the growth that the beer industry has seen in recent years.

TransDigm flies a little lower

TransDigm Group dropped 7% after announcing its fiscal fourth-quarter financial report. The supplier of parts and components for the aerospace industry reported better earnings growth than most investors were expecting, but its guidance for the 2017 fiscal year didn't live up to the consensus forecast among those following the stock. In particular, TransDigm's worries seemed to center on caution about whether major commercial aerospace manufacturers will be able to maintain their cyclical strength. Bulls believe that strong backlogs from airlines and other aircraft purchasers should support airplane-makers and by extension TransDigm, but the stock reflected the more pessimistic view today.

Dynavax plunges on bad FDA news

Finally, Dynavax Technologies lost almost two-thirds of its value on Monday. The company got negative feedback from U.S. Food and Drug Administration in the form of a complete response letter concerning its Heplisav-B vaccine for the hepatitis B virus. Dynavax said that the FDA is looking for information related to several areas, especially about cardiac events and other specific adverse events in the company's study of the vaccine. CEO Eddie Gray said in the company's release that the vaccine is still approvable, but given the delay, Dynavax might have to find a "potential pharmaceutical or financial partner." That could dilute any profits from eventual success of the vaccine, disappointing investors and causing at least some of the decline today.

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