how often should i rebalance a 90 10 investment portfolio 
rebalancing should be done periodically typically annually or when your portfolio deviates significantly from your target allocation it involves adjusting your holdings to maintain the desired asset allocation in this case 90 10 stocks bonds consider setting a threshold where you rebalance regardless of the passage of time for example anytime your portfolio drifts above 95 stock or below 85 stock you rebalance the bottom linea 90 10 investment allocation is an aggressive strategy most suitable for investors with a high risk tolerance and a long time horizon while warren buffett has an enviable track record as an investor it probably isn t for everyone 