lululemon's Secret Sauce

The mystery is how lululemon athletica has managed to turn yoga gear into a small empire, notching a market value of $10.4 billion with sales of just $712 million last year, and whether it can sustain the pace. After all, in the prior quarter it booked a record $1,800 in sales per square foot — more than three times luxury kingpin Neiman Marcus’ sales for its most recent full year.