Ratios Between Gold, Platinum and Silver
Ratios Between Gold, Platinum and Silver Ratios between Gold, Platinum and Silver show clear trends. Gold/Silver ratio shows big fluctuations. Platinum/Silver ratio shows a clear downward trend. import yfinance as yf import matplotlib.pyplot as plt import pandas as pd dateStart = "2015-01-01" dateEnd = "2025-12-31" tickers = ["GC=F", "SI=F", "PL=F"] # Gold, Silver, Platinum futures # yfinanceからまとめて取得（警告回避のため auto_adjust を明示） df = yf.download( tickers, start=dateStart, end=dateEnd, auto_adjust=False, # True/FalseどちらでもOK。とにかく明示する progress=False ) # dfは MultiIndex columns になりやすい：['Close'] で3銘柄の終値DataFrameが取れる close = df["Close"].copy() # 月次平均（pandas警告対応：'M' -> 'ME'） close_m = close.resample("ME").mean() # 比率をDataFrameで計算（列名で参照） ratio = pd.DataFrame({ "Gold/Silver": close_m["GC=F"] / close_m["SI=F"], "Gol...