The S&P/TSX Composite hit an all-time high this week, boosted by broad gains in heavyweight financial and natural resources sectors. Empire (EMP.A) is planning to convert up to a 64 Safeway and Sobeys stores in Western Canada to its discount FreshCo banner over the next five years. Canadian Imperial Bank of Commerce (CM) expects the proportion of its earnings coming from the United States to nearly double in the next three years, its CFO said on Wednesday. Enbridge (ENB) held its investor day this week providing its revised three-year outlook for the first time as a merged company with Spectra. The increased visibility should help reduce some investor concerns around its cash flow generation forecasts. Here are five stories we found interesting this week:

1. Valuations and other noteworthy trends as we head into 2018 

2. Portfolio construction resources for the ETF investor

3. The 2017 lower share buybacks in a bull market is nearly unprecedent

4. Just a really good writeup on Bitcoin

5. Making sell discipline part of your investment process