prices_rate: Calculate Growth Rate From a Vector of Stock Prices or...

Description Usage Arguments Value Author(s) References See Also Examples

Description

The formula is simply: overall.rate = prices[length(prices)] / prices[1] - 1. If units.rate is specified, then it converts to x-unit growth rate.

Usage

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prices.rate(prices, units.rate = NULL, nas = FALSE)

Arguments

prices

Numeric vector of stock prices or investment balances.

units.rate

Number of units for growth rate calculation. If unspecified, function returns total growth. To get annualized growth rate, set to 252 if prices has daily prices, 12 if prices has monthly prices, etc.

nas

If TRUE, function finds and removes any missing values (NAs) in prices. The default is FALSE to maximize speed for the usual case where there are no missing values.

Value

Numeric value indicating the growth rate.

Author(s)

Dane R. Van Domelen

References

Acknowledgment: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903.

See Also

gains.rate

Examples

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# Create vector of daily closing prices for a hypothetical stock
prices <- c(100.4, 98.7, 101.3, 101.0, 100.9)

# Overall growth is 0.50%
prices.rate(prices)

# Average daily growth is 0.12%
prices.rate(prices, 1)

# Corresponds to 36.6% annualized growth
prices.rate(prices, 252)

stocks documentation built on May 31, 2017, 3:18 a.m.