This post is one in a series in which over 50 newsletter advisors share their Top Picks for 2013.

By Vivian Lewis, Global Investing

Bombardier (BDRAF) is our top speculative  growth idea for 2013. This is potentially the best stock in our portfolio, grossly undervalued because it is French Canadian, and family-controlled.

Further, the stock is ignored by most analysts, as it is hard for single-industry analysts to quantify the value of a company that combines both rail with air transport.

It was called a "buy" by UBS Canada because of its second collaboration accord with China's Commercial Aircraft Corp. over product development on cockpit machine interfaces, electrical systems, and other technology.

While no orders have been booked, the collaboration opens the way to Bombardier selling its C-series planes in China. The Swiss bank estimates as many as 350 Bombardier planes could be sold to China yearly over 20 years, a total of 7000 aircraft.

Moreover, the Canada firm has already locked up 38% of the Chinese market, UBS' Hilda Maraachlian wrote. Her 12-month target for Bombardier is $5.50 per share as it gets airborne in China.

BDRAF may also get some rail contracts next year despite the current Chinese government's decision to put the brakes on fast passenger train spending in 2012. Next year a new team arrives in Beijing. Meanwhile BDRAF is signing huge monorail construction and equipment deals from Riyadh to São Paulo.

Its third quarter report was mixed with sales lower (big ticket items are lumpy) down to US$4.3 billion while profits rose 9% to $192 million.

In the nine-months, its net income fell 10% to $584 million or 32 cents per share. This stock is ripe for take off. And while you wait it pays a 3% dividend.

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