There are several big questions hanging over the prospects for stock markets through 2017 and while we are largely positive, investors can expect volatile spells to periodically emerge. In this week's Shares we look at the hot topics, from Article 50 to Trump's first 100 days, and many more, and highlight the investment hot spots and weak areas. We also explain why oil prices are rallying and why it pays for investors to play the long game. There's 3 reasons why energy supplier SSE could rally, accounting software firm Sage's accelerating growth ambitions, and we select our pick of the UK housebuilders, plus loads more company news, market stats, our best investment ideas and much more.