  From the stock markets of six countries with high GDP, we study the stock
indices, S&P 500 (NYSE, USA), SSE Composite (SSE, China), Nikkei (TSE, Japan),
DAX (FSE, Germany), FTSE 100 (LSE, Britain) and NIFTY (NSE, India). The daily
mean growth of the stock values is exponential. The daily price fluctuations
about the mean growth are Gaussian, but with a non-zero asymptotic convergence.
The growth of the monthly average of stock values is statistically self-similar
to their daily growth. The monthly fluctuations of the price follow a Wiener
process, with a decline of the volatility. The mean growth of the daily volume
of trade is exponential. These observations are globally applicable and
underline regularities across global stock markets.
