EigoPro 1級 読解 — The Credibility Premium: Why Words Outrun the Interest Rate

Conventional accounts of monetary policy treat the central bank as a mechanic adjusting a single lever: raise the policy rate to cool an overheating economy, lower it to revive a moribund one. Yet this mechanistic picture obscures the discipline's deepest insight, namely that the efficacy of any rate decision is parasitic upon expectations the public holds about future policy. A rate increase that markets deem transitory exerts a feeble grip on borrowing and spending; an identical move, when read as a credible signal of sustained resolve, can recalibrate behaviour across the entire term structure. The pivot from mechanics to expectations dates to the recognition that inflation is, in substantial measure, self-fulfilling. If firms and households anticipate rising prices, they raise wages and prices pre-emptively, validating the very forecast that prompted them. A central bank lacking credibility is thus condemned to chase its own tail, tightening ever more aggressively to subdue an inflation that its perceived irresolution helped entrench. Credibility, once forfeited, is ruinously expensive to reclaim, often demanding a recession deep enough to be unmistakable. This explains the modern obsession with transparency, forward guidance, and the studied constancy of inflation targets. A bank that anchors expectations need barely move the rate at all; the mere announcement of intent suffices, because agents pre-emptively adjust. Paradoxically, the most powerful instrument is not the rate but the word. The corollary is sobering: a single lapse, an unexplained reversal or a target quietly abandoned, can squander a reputation accumulated over decades, leaving the bank to govern through blunt force what it once orchestrated through mere persuasion.

5問合格 60%以上普通

新規登録 または ログイン が必要です

この単元の問題を3問、解説つきで公開しています

1級 · 読解 · 全5問

問 1

Which statement best captures the central argument of the passage?

  • The principal task of a central bank is to engineer recessions whenever inflation expectations begin to drift upward.
  • A central bank's influence derives less from the mechanical effect of rate changes than from the credibility that shapes public expectations of future policy.
  • Inflation is an inherently uncontrollable phenomenon that no amount of central-bank intervention can meaningfully restrain.
  • Central banks should abandon interest rates altogether and rely exclusively on verbal announcements to steer the economy.
Phrase

the efficacy of any rate decision is parasitic upon expectations

1級読解主旨把握論旨
⚡ひとことで

金利の機械的操作より、信認による期待形成こそが中央銀行の影響力の源泉だ、というのが論旨。

選択肢の解説Choice Analysis

「A central bank's influence derives less from the mechanical effect of rate changes than from the credibility that shapes public expectations of future policy.」

正解

本文は冒頭で「レバーを操作する技師」という機械論的見方を退け、"the efficacy of any rate decision is parasitic upon expectations" と述べて、金利決定の効果は将来政策への期待に寄生すると主張する。最終段でも "the most powerful instrument is not the rate but the word" と締めくくり、信認こそが影響力の核心だと結論づけている。したがって機械的効果より信認・期待形成を重視する選択肢が主旨に合致する。

  • 「Central banks should abandon interest rates altogether and rely exclusively on verbal announcements to steer the economy.」

    = 金利を完全に廃止し言葉だけに頼るべきだ ━ 本文は金利より言葉が強力だと述べるが、金利を放棄せよとは言っていない。"need barely move the rate" は微調整で済む意で、廃止とは異なる。。

  • 「Inflation is an inherently uncontrollable phenomenon that no amount of central-bank intervention can ever hope to restrain meaningfully.」

    = インフレは制御不能だ ━ 本文はむしろ信認ある中央銀行が期待を錨で固定すれば制御できると論じており、制御不能論とは正反対。。

  • 「The principal task of a central bank is to engineer recessions whenever inflation expectations begin to drift upward.」

    = 中央銀行の主任務は不況を起こすことだ ━ 不況は信認喪失後の高くつく回復策として言及されるだけで、主任務ではない。"ruinously expensive to reclaim" の文脈にすぎない。。

▦Collocation
パターン意味例
derive from〜に由来するIts authority derives from public trust rather than statute.
shape expectations期待を形作るForward guidance is designed to shape expectations of future rates.
less … than ~…というより〜Its power lies less in the lever than in the message.
mechanical effect機械的効果The mechanical effect of a small hike is easily overstated.
future policy将来の政策Markets price in assumptions about future policy months ahead.
❝例文

  • The bank's credibility shapes how households interpret every announcement.

    中央銀行の信認が、家計があらゆる発表をどう解釈するかを左右する。

  • A measure's efficacy often derives from how it is perceived, not its size.

    施策の効果は規模よりも、どう受け取られるかに由来することが多い。

  • Sustained resolve matters less than the public's belief in that resolve.

    持続的な決意そのものより、その決意を国民が信じるかどうかが重要だ。

  • Expectations of future policy can move markets before any rate changes.

    将来政策への期待は、金利が動く前から市場を動かしうる。

💡Tip · 覚えるコツ

主旨設問では、本文が否定する見方（ここでは機械論）を裏返した選択肢が罠になりやすい。冒頭と結論の両方で繰り返される語（expectations / credibility / word）を主軸に据えると外さない。

問 2

According to the passage, why is an identical rate increase sometimes ineffective and sometimes powerful?

  • Its effect depends solely on the precise numerical magnitude of the increase.
  • Its effect hinges on whether the increase is announced in advance or imposed without warning.
  • Its effect is determined by how quickly the central bank reverses the decision afterward.
  • Its effect depends on whether markets read it as a transitory move or as a credible signal of sustained resolve.
Phrase

when read as a credible signal of sustained resolve

1級読解詳細把握
⚡ひとことで

同じ利上げでも、市場が一時的と見るか持続的決意の信号と見るかで効果が変わる。

選択肢の解説Choice Analysis

「Its effect depends on whether markets read it as a transitory move or as a credible signal of sustained resolve.」

正解

第1段末で本文は、"A rate increase that markets deem transitory exerts a feeble grip" と述べ、対照的に "when read as a credible signal of sustained resolve, can recalibrate behaviour across the entire term structure" と続ける。つまり同一の利上げでも、市場の解釈が一時的か持続的決意の信号かで効果が分かれる。これが正解の根拠である。

  • 「Its effect depends solely on the precise numerical magnitude of the increase.」

    = 効果は引き上げ幅の数値だけで決まる ━ 本文は "an identical move" すなわち同じ幅でも解釈次第で効果が変わると述べており、数値のみで決まるという読みは矛盾する。。

  • 「Its effect is determined by how quickly the central bank reverses the decision afterward.」

    = 後で撤回する速さで効果が決まる ━ 撤回（reversal）は最終段で信認喪失の例として出るが、第1段の効果の差を説明する根拠ではない。。

  • 「Its effect hinges on whether the increase is announced well in advance or imposed without any warning.」

    = 事前予告の有無で効果が決まる ━ 予告(forward guidance)は第3段の話題で、第1段の効果の差は『一時的か持続的決意か』の解釈にあるとされる。。

▦Collocation
パターン意味例
deem ~ transitory〜を一時的とみなすInvestors deemed the cut transitory and barely reacted.
a credible signal信頼できる信号The statement was read as a credible signal of restraint.
exert a grip on〜への効力を及ぼすLow rates exert a powerful grip on housing demand.
sustained resolve持続的な決意Markets reward visible, sustained resolve over one-off gestures.
term structure（金利の）期間構造Guidance can reshape the entire term structure of rates.
❝例文

  • Traders dismissed the hike as transitory, so spending barely slowed.

    トレーダーが利上げを一時的と片付けたため、支出はほとんど減速しなかった。

  • Read as a credible signal, the same move tightened conditions sharply.

    信頼できる信号と読まれると、同じ動きが状況を一気に引き締めた。

  • Whether a policy bites depends on how its permanence is judged.

    政策が効くかは、その持続性がどう判断されるかにかかっている。

  • A move seen as resolute reshapes behaviour across many markets.

    決然としたと見なされる動きは、多くの市場で行動を作り変える。

💡Tip · 覚えるコツ

detail設問は本文の対比構造（A…transitory ↔ B…credible）をそのまま選択肢にした正解が多い。『solely』『only』など極端な限定詞を含む選択肢は誤りの常套。

問 3

What does the passage say about a central bank that has lost credibility?

  • It is permanently barred from ever influencing inflation through interest rates again.
  • It can swiftly restore confidence by quietly lowering its inflation target.
  • It regains influence automatically once inflation expectations stabilise on their own.
  • It must tighten ever more aggressively and may need a recession deep enough to be unmistakable before regaining trust.
Phrase

ruinously expensive to reclaim

1級読解詳細把握
⚡ひとことで

信認を失った中銀はより激しい引き締めを強いられ、回復には明白なほど深い不況を要する。

選択肢の解説Choice Analysis

「It must tighten ever more aggressively and may need a recession deep enough to be unmistakable before regaining trust.」

正解

第2段は信認なき中銀を "condemned to chase its own tail, tightening ever more aggressively" と描く。さらに "Credibility, once forfeited, is ruinously expensive to reclaim, often demanding a recession deep enough to be unmistakable" と続け、回復には誰の目にも明らかな深い不況を要すると述べる。よってより激しい引き締めと深い不況を挙げる選択肢が正しい。

  • 「It can swiftly restore confidence by quietly lowering its inflation target.」

    = 目標を静かに下げれば速やかに信頼回復できる ━ 本文では目標を黙って捨てること自体が信認を浪費する行為とされ、回復策にはならない。。

  • 「It regains influence automatically once inflation expectations stabilise on their own.」

    = 期待が自然に安定すれば自動的に影響力が戻る ━ 本文は回復が "ruinously expensive" で深い不況を要すると述べ、自動回復を否定する。。

  • 「It is permanently barred from ever influencing inflation through any changes in interest rates again.」

    = 二度と金利で影響を及ぼせなくなる ━ 回復は高くつくが不可能とは書かれておらず、永久排除という断定は本文を超える。。

▦Collocation
パターン意味例
chase one's own tail堂々巡りをするWithout trust, the bank kept chasing its own tail.
tighten aggressively積極的に引き締めるIt tightened aggressively to offset its lost authority.
once forfeitedひとたび失えばTrust, once forfeited, is hard to rebuild.
ruinously expensive破滅的に高くつくReclaiming credibility proved ruinously expensive.
deep enough to ~〜なほど深いIt demanded a downturn deep enough to be undeniable.
❝例文

  • Having lost trust, the bank raised rates far beyond what should have sufficed.

    信頼を失った中銀は、本来必要だった水準を遥かに超えて利上げした。

  • Regaining credibility required a slump no one could dismiss.

    信認の回復には、誰も無視できない景気後退が必要だった。

  • A discredited authority is forced to govern by blunt overcorrection.

    信用を失った当局は、乱暴な過剰修正で統治せざるを得ない。

  • Restoring a tarnished reputation is far costlier than preserving it.

    傷ついた評判の回復は、維持するよりはるかに高くつく。

💡Tip · 覚えるコツ

『once forfeited / once lost』は『取り返しが極めて高くつく』という否定的含意の合図。回復が『迅速・自動・無料』だと言う選択肢はほぼ誤り。

残り2問は、解いて確かめられます

全5問すべてに、この形式の解説が付いています。 間違えた問題は記録され、あとから復習できます。

無料で登録して続きを解く

インストール不要・カード登録なし・いま全機能無料

この単元の講義を見る1級の単元一覧1級の用語集