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Q054

4択Multiple choice基礎Basic
為替・通貨安・購買力exchange rates · currency depreciation · purchasing power
自国通貨が主要通貨に対して大きく下落(通貨安)した場合、一般的な家計に起こる影響として最も適切な組み合わせはどれですか。When a country's currency depreciates sharply against major currencies, which combination best describes the typical effects on an ordinary household?
  1. 輸入品や海外旅行が割高になる一方、外貨建て資産の自国通貨換算額は増える
  2. 輸入品が安くなり、海外旅行も割安になる
  3. 国内の物価には影響せず、輸出企業だけが影響を受ける
  4. 外貨建て資産の価値が下がり、国内資産の価値が上がる
  1. Imported goods and overseas travel become more expensive, while foreign-currency assets are worth more in home-currency terms
  2. Imported goods and overseas travel become cheaper
  3. Domestic prices are unaffected; only exporters are impacted
  4. Foreign-currency assets lose value while domestic assets gain

解答Answer

正解: ACorrect: A

通貨安は輸入インフレを通じて生活コストを押し上げる一方、外貨建て資産を持つ人にとっては自国通貨換算での資産増となります。資産を自国通貨だけで持つ人が最も影響を受けます。Depreciation raises living costs through imported inflation, but increases the home-currency value of foreign assets. Households whose wealth is entirely in the home currency are the most exposed.

解説Explanation

為替は個人の経済生活に静かに、しかし広く影響します。通貨が下落すると、エネルギー、食料、電子機器などの輸入品や、海外旅行・留学の費用が上がります。これは輸出企業や海外資産を持つ人には追い風ですが、収入も資産も自国通貨のみという典型的な家計にとっては純粋な購買力の低下です。2022年前後の英ポンドの急落、近年の円安、そしてトルコリラやアルゼンチンペソの慢性的な下落は、その影響を生活者に実感させました。逆に通貨高になれば輸入品は安くなりますが、外貨建て資産は目減りします。つまり、通貨の変動は「良い・悪い」ではなく、誰にとってどちら向きかという問題です。この非対称性を理解すると、なぜ一部の資産を他通貨で持つことが保険になり得るのかが見えてきます。Exchange rates quietly but broadly shape personal finances. When a currency weakens, imported energy, food, electronics, and the cost of overseas travel or study all rise. This benefits exporters and people holding foreign assets, but for the typical household whose income and savings are both in the home currency, it is a pure loss of purchasing power. The sharp fall of the British pound around 2022, the prolonged weakness of the Japanese yen, and the chronic declines of the Turkish lira and Argentine peso all made this tangible for ordinary people. The reverse holds when a currency strengthens: imports get cheaper but foreign assets shrink in local terms. Currency moves are therefore not simply good or bad; the question is who is positioned on which side. Recognizing this asymmetry explains why holding some assets in other currencies can function as insurance.

課題Issue

為替の方向を予測して利益を得ようとするのは、プロでも成功が難しい領域です。また、外貨資産を持つと自国通貨高の局面では損失を被るため、「通貨安への保険」は「通貨高のリスク」と表裏一体であることを理解していない人が多いです。Trying to profit by predicting currency direction is difficult even for professionals. Holding foreign assets also means losing when the home currency strengthens, and many people fail to see that insurance against depreciation is inseparable from exposure to appreciation.

改善案Improvement

為替を当てるのではなく、「将来の支出がどの通貨で発生するか」を基準に考えましょう。海外留学や移住、輸入品への依存度が高い生活なら外貨建て資産の比率を高める合理性があり、生涯を自国で過ごす予定なら過度な外貨比率は不要です。Instead of forecasting rates, anchor on the currency in which your future spending will occur. If overseas study, relocation, or heavy reliance on imports is likely, a higher share of foreign-currency assets is rational; if your life will be lived entirely at home, an excessive foreign share is unnecessary risk.