{% if e.is_exempt %}
Would have disallowed:{{ e.disallowed_math }}→ $0 (exempt)
{% else %}
Disallowed:{{ e.disallowed_math }}
{% endif %}
Confidence: {{ e.confidence_reason }}
{% if e.confidence_promote %}
↑ {{ e.confidence_promote }}
{% endif %}
{% if e.confidence_demote %}
↓ {{ e.confidence_demote }}
{% endif %}
{% if e.is_permanent_ira %}
Permanently disallowed — replacement leg is in a tax-advantaged account
(IRA / Roth / 401(k) / HSA), so §1091(d)'s basis rollover cannot apply.
The loss is gone for good (Rev. Rul. 2008-5).