长持SPY的风险很小。长持相当于把其中的涨涨落落抵消了。短线更难，因为回报更大（如果成功）

来源: QQQ2074 于 2025-11-15 10:57:59 [旧帖] [给我悄悄话] 本文已被阅读：次

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