It's how Giles Hargreaves built such an outstanding track record with Marlborough Special Situations .. Lots of small positions in small stocks, and then really good trading habits and investing principles that average out across them.
I really want to build my own Buffett portfolio of 4 or 5 companies I'd always want to own more of .. Tencent and Alibaba are my two favourites at the moment, but PE ratios around 50-60 have kept me on the sidelines (apart from via funds).
Maybe Tencent is top of a Chinese Tech Bubble, but it's got a decent 35-38% Return on Capital for the past two years, and their WeChat app is basically how the Chinese do everything: messages, social media, payments, etc. Huge gaming division .. It's been falling for a few days – I think if it somehow falls to $50, I'd be starting my buy-and-hold portfolio