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Stocks of major corporations provided on average a riskpremium of 9.1 percent a year over the return on Treasury bills. 大型公司股票提供了一個(gè)相較短期國(guó)庫(kù)券廻報(bào)平均爲(wèi)9.;1%25一年的風(fēng)險(xiǎn)溢價(jià)。