Gold, used for jewelry and ornaments at times, is now considered a safe metal for investment. In addition to buying and selling gold physically, some markets offer electronic trade in gold. Trade volume is on surge in these bullion markets with each passing day. Daily opening and closing gold prices are used for analysis for 7740 days. Data series of daily return on investment in gold is split into two data series; first when the price goes up and second when the price goes down, at the day’s end. Statistical properties of three data series are analyzed and probabilities to earn profits are calculated during any day regardless of what types of decisions are going to be made that day. Probabilities of daily return, for both long and short positions, are presented in the form of tables. The expected daily profit of a trader with associated probability is explained in an illustrative example.

中文翻译：

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黄金投资的可能每日回报

黄金，有时用于珠宝和装饰品，现在被认为是一种安全的投资金属。除了实物买卖黄金外，一些市场还提供黄金电子交易。这些金银市场的交易量日新月异。7740天每日开盘和收盘黄金价格用于分析。黄金日投资收益数据系列分为两个数据系列；第一次当价格上涨时第二次当价格下跌时，在一天结束时。分析三个数据系列的统计属性，并计算任何一天赚取利润的概率，而不管当天将做出何种类型的决策。多头和空头头寸的每日回报概率以表格的形式呈现。