
Crystallise capital losses without tripping the US wash-sale rule or the UK 30-day bed-and-breakfasting restriction. 2026 figures, the ETF pairs that actually work, when automated services beat DIY, and the ten mistakes that quietly destroy most harvesters’ tax benefit.

Should you choose index funds or mutual / actively managed funds? This 2026 guide compares costs, platforms, and SPIVA performance data across both US and UK markets, with calculators in dollars and pounds, so DIY investors can pick the right approach for their accounts.
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