| Diversification | One stock or sector sinking the portfolio | Little; you give up the upside of concentration | Correlations rose in crashes; most stocks fell together |
| Cash and T‑bills | Any fall, on the part held in cash | Low return: 2.1% a year vs 15.2% for the S&P 500 | Rarely in a fall; the risk is holding too much for too long |
| Bonds | Recessions and panics, when rates fall | Lower long‑run return | 2022: US bonds (AGG) fell 14.4% during the bear market |
| Protective puts | A fall below the strike price, until expiry | A premium, renewed at each expiry | Costly to keep rolling; a fall after expiry is not covered |
| Collars | A fall below the put strike | Gains above the call strike | Strong rallies are given away |
| Buffer ETFs | A set slice of losses, often the first 10%, over an outcome period | Capped gains and higher fees than index funds | Losses beyond the buffer; buying mid‑period |
| Inverse ETFs | Short, sharp falls | Losses whenever markets rise; daily‑reset drift | SH lost 12.8% a year over the whole period |
| Stop‑losses and drawdown rules | A position or portfolio falling past a set level | Selling dips that recover | Gaps: a sale can fill far below the stop |
| Trend rules | Long, grinding bear markets | Whipsaws and missed rebounds | Fast crashes hit before the rule reacts |
| Macro regime exits | Deteriorating conditions before or during a bear market | A subscription; time out of the market | Sudden shocks that macro data does not show in advance |