bidask (version 2.1.4)

edge_expanding: Expanding Estimates of Bid-Ask Spreads from Open, High, Low, and Close Prices

Description

Implements an expanding window calculation of the efficient estimator of bid-ask spreads from open, high, low, and close prices described in Ardia, Guidotti, & Kroencke (JFE, 2024): tools:::Rd_expr_doi("10.1016/j.jfineco.2024.103916").

Usage

edge_expanding(open, high, low, close, sign = FALSE, na.rm = TRUE)

Value

Vector of spread estimates. A value of 0.01 corresponds to a spread of 1%. This function always returns a result of the same length as the input prices.

Arguments

open

numeric vector of open prices.

high

numeric vector of high prices.

low

numeric vector of low prices.

close

numeric vector of close prices.

sign

whether to return signed estimates.

na.rm

whether to ignore missing values.

Details

Prices must be sorted in ascending order of the timestamp.

References

Ardia, D., Guidotti, E., Kroencke, T.A. (2024). Efficient Estimation of Bid-Ask Spreads from Open, High, Low, and Close Prices. Journal of Financial Economics, 161, 103916. tools:::Rd_expr_doi("10.1016/j.jfineco.2024.103916")

Examples

# reduce number of threads to pass CRAN checks (you can ignore this)
data.table::setDTthreads(1)

# simulate open, high, low, and close prices with spread 1%
x <- sim(n = 1000, spread = 0.01)

# estimate the spread using an expanding window
s <- edge_expanding(x$Open, x$High, x$Low, x$Close)
tail(s)
# equivalent to
s <- edge_rolling(x$Open, x$High, x$Low, x$Close, width = 1:nrow(x), na.rm = TRUE)
tail(s)