Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why are daily rebalanced inverse/leveraged ETFs bad for long term investing?
If you want to make a profit from long term trading (whatever "long term" means for you), the best strategy is to let the good performers in your portfolio run, and cull the bad ones.  Of course that strategy is hard to follow, unless you have the perfect foresight to know exactly how long your best performing investments will continue to outperform the market, but markets don't always follow the assumption that perfect information is available to all participants, and hence "momentum" has a real-world effect on prices, whether or not some theorists have chosen to ignore it. But a fixed strategy of "daily rebalancing" does exactly the opposite of the above - it continuously reduces the holdings of good performers and increases the holdings of bad.  If this type of rebalancing is done more frequently than the constituents of benchmark index are adjusted, it is very likely to underperform the index in the long term. Other issues in a "real world" market are the impact of increased dealing costs on smaller parcels of securities, and the buy/sell spreads incurred in the daily rebalancing trades. If the market is up and down 1% on alternate days with no long tern trend, quite likely the fund will be repeatedly buying and selling small parcels of the same stocks to do its daily balancing.