PFIC tax rules make holding foreign mutual funds and ETFs a financial catastrophe for US tax residents

When a US tax resident (including green card holders and visa workers) holds shares in a Passive Foreign Investment Company (PFIC) -- which includes virtually all non-US mutual funds and many non-US ETFs -- they face punitive tax treatment under IRC Sections 1291-1298. So what? Gains are taxed at the highest ordinary income rate (currently 37%) regardless of holding period, plus an interest charge is assessed as if the gain accrued ratably over the holding period. So what? A $10,000 gain on a foreign mutual fund held for 10 years can result in an effective tax rate exceeding 50-60% after the interest charge, compared to 15-20% for an equivalent US-domiciled fund. So what? Immigrants who built investment portfolios in their home countries before moving to the US face a brutal choice: sell everything before becoming a US tax resident (triggering home-country capital gains taxes) or keep holding and face PFIC taxation. So what? Many immigrants don't learn about PFIC rules until their first US tax filing, by which point they've already triggered years of PFIC exposure. So what? Retroactive compliance requires filing Form 8621 for each PFIC holding for each year, which costs $500-2,000 per form per year in CPA fees, creating a financial and administrative nightmare that punishes people simply for having invested responsibly in their home country. The problem persists because PFIC rules were designed in 1986 to prevent wealthy Americans from sheltering income offshore, but they apply identically to immigrants who had no tax-avoidance intent. Congress has no political incentive to carve out exceptions because immigrants are not a powerful voting bloc, and the IRS treats all US tax residents identically regardless of origin.