$Lululemon(LULU.US)

Context: Once upon a time LULU was a strong growth story (and I like the brand) but the stock has struggled as sales and brand momentum weakened. The latest results showed further pressure on the business.

My trade: I sold my position earlier in the year after a rebound for a small profit. Looking back, I’m glad I didn’t try to hold through the deterioration.

Takeaway: This experience reinforced an important lesson for me: for long-term investing, I want to focus on businesses with strong and durable moats. A good brand can still lose momentum and I would rather concentrate my long-term holdings in businesses with stronger competitive advantages.