difference_in_time: Difference in time

In dispositionEffect: Analysis of Disposition Effect on Financial Portfolios

Difference in time

Description

Financial implementation of base::difftime, that takes into account trading day horizons (including pre and after market hours.)

Usage

difftime_financial(
  from,
  to,
  pre_market = 8,
  after_market = 22,
  units = "hours"
)

difftime_compare(from, to, time_threshold = "0 mins")

Arguments

from	POSIXct for the initial date.
to	POSIXct for the final date.
pre_market	numeric or character representing the hour of the day at which the pre-market begins.
after_market	numeric or character representing the hour of the day at which the after-market ends.
units	Character string specifying a time unit. (See base::difftime).
time_threshold	Character in the format "value units" indicating the time threshold at which the computed financial difftime has to be evaluated (for instance "05 mins" or "20 hours"). The allowed units are "secs", "mins", "hours", "days" and "weeks" (See base::difftime).

Value

difftime_financial

returns a numeric value in hours. To convert in a different time unit use base::as.numeric and specify the units argument (units = c("secs", "mins", "hours", "days", "weeks")).

difftime_compare

returns a character string whose possible values are "greater" or "smaller", indicating whether the difftime_financial evaluated between the two dates is greater or smaller than the chosen threshold.

Functions

• difftime_financial: Extension of the base::difftime function to calculate the actual financial difftime taking into account pre and after market moments and financial markets closing days.

• difftime_compare: Comparison of the difftime_financial with respect to a given time threshold.

See Also

base::difftime

dispositionEffect documentation built on May 30, 2022, 9:05 a.m.