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Openai/69286a1e-2f50-800a-b685-0647e6b12a18
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=== Assistant: 好 — 我把问题当作独立同分布的二项模型来算(与你之前的模型一致): === 好 — 我把问题当作独立同分布的二项模型来算(与你之前的模型一致): * 每次胜率 p=0.8p=0.8p=0.8,赢时本金 ×2,输时本金 ×0.5。 * 起始 10U,目标 1,000,000U(倍率 R=100,000R=100{,}000R=100,000)。 * 交易次数上限为 nnn。在最多 nnn 次交易内,至少出现 www 次“赢”则能达标。 * 我计算了不同“接近 100%” 的阈值对应所需的最小 nnn(用精确的二项分布累加求概率)。 下面是结果(每行说明:阈值 → 需要的最小交易次数 nnn → 在该 nnn 下的成功概率 → 达标所需最少胜场 wminw_{\min}wmin): * 要成功概率 ≥ 90%:n=39n = 39n=39,成功概率 ≈ 92.58%,需最少胜场 wmin=28w_{\min}=28wmin=28。 * 要成功概率 ≥ 95%:n=43n = 43n=43,成功概率 ≈ 96.38%,需最少胜场 wmin=30w_{\min}=30wmin=30。 * 要成功概率 ≥ 99%:n=51n = 51n=51,成功概率 ≈ 99.21%,需最少胜场 wmin=34w_{\min}=34wmin=34。 * 要成功概率 ≥ 99.9%:n=63n = 63n=63,成功概率 ≈ 99.93%,需最少胜场 wmin=40w_{\min}=40wmin=40。 * 要成功概率 ≥ 99.99%:n=73n = 73n=73,成功概率 ≈ 99.991%,需最少胜场 wmin=45w_{\min}=45wmin=45。 补充两句帮助直观理解: * 按对数期望计算,每次的期望对数增长为 E[lnM]=0.8ln2+0.2(−ln2)=0.6ln2≈0.4159E[\ln M] = 0.8\ln2 + 0.2(-\ln2) = 0.6\ln2 \approx 0.4159E[lnM]=0.8ln2+0.2(−ln2)=0.6ln2≈0.4159。 因此按均值估计需要的交易次数是 ln(100,000)/0.4159≈27.7\ln(100{,}000)/0.4159 \approx 27.7ln(100,000)/0.4159≈27.7 次(这是“平均所需次数”的近似),但为了把概率推到接近 100%,要比均值大得多(上面给出的是精确概率下的 nnn)。 * 绝对 100% 的概率在独立随机模型里不可能(任何 p<1 时,总存在失败的正概率)。所以上面的“接近 100%”我分别给出了 99%、99.9%、99.99% 等常用阈值。 如果你要我做下一步,我可以立刻: * 把每个给定的 nnn 对应的成功概率随 nnn 的曲线画出来(Monte-Carlo 或精确二项累积),或者 * 把计算结果导成表格 / CSV 下载,或 * 把现实因素(手续费、爆仓阈值、保证金限制)加进模型再算一次(这通常会显著增加所需 nnn)。 你想看哪一种?
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