第22章 回测三年数据:择时成功率不足四成

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    第22章回测三年数据:择时成功率不足四成(第1/2页)
    2026年4月9日星期三晚上20:30
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    【群聊记录】
    时间:20:30
    明觉:晚间复盘。今日市场窄幅波动,M公司收于44.8元,仍在降龙兄所划区间内。吾之模拟网格无触发。心境平稳,继续记录。
    巴派谪传弟子-老金:我今天用处理债务后剩下的一点钱,按贝兄教的,设置了第一个ETF网格条件单。只投了5000块,设了5%间距,每格500元。虽然金额小,但感觉像正式开始了。希望能坚持下去。
    锅王:对决账户,今天AI股又跌回去一点,总收益-4%。乌龟账户呢?@贝悟得别告诉我又没动。
    降龙十八掌:第二天。M公司今天最高44.9,最低44.3,就在我那区间里晃荡。看明天能不能选择方向。贝悟得,你那套“应对”技术,今天又没动静吧?等着兔子撞树呢?
    无所不晓:空仓。看看。
    贝悟得:今日各账户无触发,净值基本持平。M公司价格在区间内,无操作信号。关于“择时”与“预测”的有效性,昨天我们有了一个一周的微型赌约。在那之前,我想分享一些更长期的数据,这些数据是我过去几年为了验证自己的投资理念,花费不少时间做的回测研究的一部分。它们直接回答一个问题:基于技术指标(或其他短期信号)的择时交易,长期成功率到底有多高?
    贝悟得:我分享三个简单的回测研究结果,均基于A股市场2019年1月至2021年12月整整三年的历史数据。标的为沪深300指数(或代表性ETF),因为宽基指数受个股特异性影响小,更能反映市场整体特征。回测考虑了交易佣金和冲击成本。请注意,回测基于历史,不代表未来,但具有统计参考价值。
    研究一:基于单一常见技术指标的择时
    指标:MACD金叉/死叉(最常用的趋势指标之一)。
    策略:当沪深300指数日线MACD出现“金叉”(DIF上穿DEA)时,在收盘价买入。当出现“死叉”(DIF下穿DEA)时,在收盘价卖出。每次买卖均为全仓。
    回测结果:
    三年间,共触发金叉买入信号37次,死叉卖出信号36次。平均每月交易超过1次。
    交易胜率(卖出价高于买入价的比例):41.7%。这意味着超过一半的交易是亏损的。
    累计收益率(不考虑分红):-8.2%。
    同期沪深300指数涨幅(买入并持有):+46.3%。
    结论:仅依据MACD金叉死叉进行全仓择时,在测试的三年内,不仅大幅跑输指数,而且本身是亏损的,胜率不足五成。频繁交易还产生了可观的摩擦成本。
    研究二:基于复合技术条件的“高胜率”形态择时
    策略:寻找同时满足三个条件的买点:1.股价站上20日均线;2.成交量较前一日放大超过20%;3.RSI(6)从低于30上穿30(超卖反弹)。买入后持有5个交易日卖出(博短线反弹)。同样全仓进出。
    回测结果:
    三年间,共捕捉到符合条件的买点28次。
    交易胜率(持有5日后卖出价高于买入价):46.4%。依然不足五成。
    平均每次交易收益率:+0.32%(胜率不足,靠少数高盈利交易拉平)。
    累计收益率:+9.1%(未扣除多次交易的高额摩擦成本,若扣除,可能接近零或为负)。
    同期指数涨幅:+46.3%。
    结论:即使结合了价格、成交量、超卖三个维度,试图寻找“高概率”短线机会,其胜率依然未能超过50%,长期累积收益远低于简单持有。且这种策略需要时刻盯盘,捕捉信号,对执行纪律和心理是极大考验。
    研究三:基于“技术分析”常用支撑压力位的波段操作
    策略:以沪深300指数过去20个交易日的最高价和最低价构成动态箱体。当价格跌至箱体下沿(支撑位)时买入,涨至箱体上沿(压力位)时卖出。每次买卖半仓(留一半现金,模拟一定风险控制)。
    回测结果:
    三年间,触发箱体交易信号频繁,共完成112次完整买卖轮回。
    单次交易胜率:52.7%。略高于五成,但请注意,这是基于“箱体震荡”的假设,在趋势市中会反复打脸。
    累计收益率:+18.5%。
    最大回撤:-15.2%(发生在2020年3月全球暴跌,箱体下沿被连续击穿时)。
    同期指数涨幅:+46.3%,最大回撤约-16.8%。
    结论:在震荡市中,基于支撑压力的波段操作可能有一定效果(胜率略超50%,收益为正)
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