A fixed crypto sleeve meets its first down week after four gains of 11-33%
Should the allocator rebalance the small crypto sleeve back to its fixed weight on this -8.21% week, or leave it underweight until the run of weekly gains resumes?
The market facts are real; the decision maker is illustrative.
The week and the position
In the week of 7 May 2018, ETH fell 8.21% to 729.08, after four straight up weeks of 33.34%, 16.3%, 11.31% and 14.97%. It traded a 26.21% range, hitting a low of 633.20 on Saturday and a best day of +6.5% on Sunday, with realised volatility at 117.4% annualised and volume 1.57 times the prior 12-week average. Price sat 37.1% below its 52-week high, and the hourly correlation with BTC was 0.86, though ETH still outperformed BTC by 1.95 percentage points. An illustrative allocator runs a small fixed-weight crypto sleeve inside a larger fund and must decide whether to restore the weight after this loss.
Judgment
A fixed-weight sleeve is rebalanced by rule, not by view of the market. Restore the weight to its target this week: the four prior up weeks pushed the sleeve above target, and this -8.21% week partly unwinds them. Do not enlarge the sleeve to chase the recovery, since realised volatility of 117.4% and a 26.21% range mean a small weight already carries the intended risk. Accept that the sleeve's 37.1% distance from its 52-week high can widen and that Sunday's +6.5% is not evidence of a turn.
What would change it
If the fund's policy caps the sleeve's rebalancing to a schedule rather than weekly, follow that schedule instead. If a second consecutive down week closes below 633.20, pause further rebalancing until volatility and the range contract towards their prior 12-week norms.
What sets this case apart
The decision is mechanical rebalancing after four up weeks, not a view on whether ETH has bottomed.