ドル円アノマリー追記：データが暴く「公務員の給料」も刈り取られる日 前回の記事では、「毎月25日の給料日」を起点としたシステム的な円売り・ドル買いアノマリーについて解説しました。今回はさらに解像度を上げ、「毎月1日〜31日の日付別」でドル円の平均変化率（リターン）を可視化してみました。 使用したPythonコードは以下の通りです。 ‘’’Python import yfinance as yf import matplotlib.pyplot as plt import pandas as pd import seaborn as sns # 分析期間の設定 dateStart = "2015-01-01" dateEnd   = "2026-05-23" ticker = "JPY=X"   # ドル円 df = yf.download(     ticker,     start=dateStart,     end=dateEnd,     auto_adjust=False,     progress=False ) if isinstance(df.columns, pd.MultiIndex):     close = df["Close"][ticker].dropna() else:     close = df["Close"].dropna() daily_return = close.pct_change() * 100 analysis_df = pd.DataFrame({"Return": daily_return}) analysis_df.index = pd.to_datetime(analysis_df.index) analysis_df["Day_of_Month"] = analysis_df.index.day analysis_df = analysis_df[analysis_df.index.dayofweek < 5] pivot_table = analysis_df.groupby("Day_of_Month")["Return...

Observational Notes on Silver Paper Investment Trusts • There are few signs that the physical silver price itself is about to decline. (Industrial demand and physical scarcity remain intact.) • However, there appear to be structural risks in the silver paper market (investment trusts, certificate-based products). • Recently: • A clearly inexperienced retail crowd has begun flowing into silver investment trust forums. • Discussions are heavily focused on price levels and price increases . • There is almost no discussion of delivery conditions, emergency clauses, or redemption terms . → This suggests a growing misconception that paper price = value . • At the same time, there are visible signs that: • More experienced participants, and • People with strong risk-management awareness are quietly taking profits and reducing positions. • This behavior appears less like a bearish view on silver itself , and more like a deliberate move to distance them...

Ratios between Gold, Platinum and Silver Rather than focusing on absolute prices, this article looks at price ratios between gold, platinum, and silver over long time horizons. Ratios often reveal structural changes that are harder to see in nominal price charts. Code is here. https://tkgwithpython.blogspot.com/2026/01/ratios-between-gold-platinum-and-silver.html This is not an investment thesis, nor a trading strategy. It is simply an observation about long-term relative movements. Gold / Silver Ratio: Volatile over the Past 10 Years Over the past one decades, the Gold/Silver ratio has shown highly volatile behavior. • Sharp spikes during periods of financial stress • Rapid reversals when panic subsides • Strong sensitivity to monetary policy, inflation expectations, and market sentiment This volatility suggests that the Gold/Silver ratio functions more as a financial stress indicator than as a stable long-term trend. In other words, it reflects short- to medium-term se...

  +AI & Rook In chess, the rook is not the most complex piece. It does not move diagonally, it does not jump, and it does not surprise. Yet in many games, the rook quietly decides the outcome. I believe +AI plays a similar role in today’s world . +AI as a Rook The rook moves in straight lines—horizontally and vertically. Its strength lies not in creativity, but in reach, consistency, and speed . +AI behaves in much the same way. It does not replace human intention or strategy. Instead, it extends them—across space and across time. In practical terms, the effective use of +AI can be summarized into two main forms: • Horizontal expansion • Vertical expansion Horizontal Expansion: Reusing Success Across Markets Horizontal expansion means applying a method that worked in one domain to another domain. In investment terms, this could mean: • Taking a strategy that worked in equities • Testing it in FX, commodities, or other markets With +AI,...