This is a sample 70/30 portfolio which implements a core/satellite approach. When done correctly, I believe the portfolio should be analyzed daily, but updated minimally. A thoughtful portfolio of ETF’s or mutual fuunds should be rebalanced as the market tilts the asset class weightings, but be able to withstand market volatility without a major overhaul. The satellite portion of the portfolio may be rebalanced or exchanged more often, depending on market conditions and IPS rules. In my opinion, many investors do not put enough thought into their fund selection or weightings, so they feel forced to overcorrect as the market changes, oftentimes chasing performance.