It’s our nature to compare our performance to others. Clothes, cars, homes, vacations, athletic skill, personal wealth, even our kids—it’s all part of a complex mental calculation that tells us how we stack up. But is there any such thing as a reliable benchmark? In life, certainly not. In investing, the answer also is “no,” as evidenced by substantial tracking error in classic benchmark indices. What’s an investor to do? We’ll share our advice after a review of Q2 markets.