library(quantmod)
## Warning: package 'quantmod' was built under R version 4.5.2
## Loading required package: xts
## Warning: package 'xts' was built under R version 4.5.2
## Loading required package: zoo
## 
## Attaching package: 'zoo'
## The following objects are masked from 'package:base':
## 
##     as.Date, as.Date.numeric
## Loading required package: TTR
## Warning: package 'TTR' was built under R version 4.5.2
## Registered S3 method overwritten by 'quantmod':
##   method            from
##   as.zoo.data.frame zoo
getSymbols("MSFT",
           src="yahoo",
           from="2025-10-01",
           to="2026-01-31")
## [1] "MSFT"

#I need to find the number or rows

nrow(MSFT)
## [1] 84
open_prices <- MSFT$MSFT.Open
which.max(open_prices)
## [1] 20
max(open_prices)
## [1] 550