Valero Energy：在 M2 擴張回落之際，利用「石油轉白銀」網格獲利（NYSE:VLO）
· seekingalpha.com
Valero Energy (VLO) 提供煉油利差的投資機會，且受原油價格波動影響較小。
Silver can be exchanged for currency across the world. Trends in governments' monetary policy and fiscal attitudes coupled with the behavior of banks have all r...