事实上，这种背离并不难理解。因为股票是长久期资产，交易的是预期，一旦市场嗅到行业利润可能触底回升，资本市场就会提前启动，根本不需要等到现货价格真正上涨。而螺纹钢价格反映的是当下，仍供大于求的市场格局。
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We’ve argued that the zero-knowledge paradigm has two advantages over simple Chaumian credentials. First, it’s potentially much more expressive. Second, it allows a User to re-use a single credential many times without needing to constantly retrieve new single-use credentials from the Issuer. While that’s very convenient, it raises a concern we already discussed: what happens if a hacker steals one of these re-usable credentials?
In Sharryn Brownlee’s experience, it’s when their kids reach the final years of primary school that a lot of parents start to ask one another the same question.