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-rw-r--r--getBloombergData.R90
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diff --git a/getBloombergData.R b/getBloombergData.R
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--- a/getBloombergData.R
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-getBloombergData <- function(conn,ticker,start.date){
- require(TTR)
- ohlc <- bdh(conn,paste(ticker,"Equity"),c("PX_OPEN","PX_HIGH","PX_LOW","PX_LAST","VOLUME"),start.date,dates.as.row.names=F)
- colnames(ohlc) <- c("Date","Open","High","Low","Close","Volume")
- ohlc <- xts(ohlc[,-1],as.Date(ohlc$Date))
- #split information
- spl <- bds(conn,paste(ticker,"Equity"),c("EQY_DVD_ADJUST_FACT"))
- # bds returns NULL if there is no data.
- #Adjustment Factor Operator Type
- # 1 = div
- # 2 = mul
- # 3 = add
- # 4 = sub
- #Adjustment Factor Flag
- # 1 = prices only
- # 2 = volumes only
- # 3 = prices and volume
-
- # can't handle 3 or 4 yet
- if(NROW(spl)!=0){
- if (NROW(spl[spl[,"Adjustment Factor Operator Type"] %in% c(3, 4),])>0){
- stop("case not handled")
- }else{
- spl[spl[,"Adjustment Factor Operator Type"]==1, "Adjustment Factor"] <-
- 1/spl[spl[,"Adjustment Factor Operator Type"]==1, "Adjustment Factor"]
- }
- spl <- xts(data.frame(spl$"Adjustment Factor",
- ifelse(spl$"Adjustment Factor Flag" %in% c(2,3),
- spl$"Adjustment Factor",NA)),
- order.by = as.Date(spl$"Adjustment Date"))
- #aggregate non-unique dates
- spl <- as.xts(aggregate(spl, identity, prod, na.rm=T))
- if(any(time(spl)>= start.date & time(spl)<=Sys.Date())){
- spl <- window(spl, start=start.date, end = Sys.Date())
- }else{
- spl <- NULL
- }
- }
- #div information
- #we need to override the end date as well cause the Ex-Date might be in the
- #future
- override_fields <- c("DVD_START_DT", "DVD_END_DT")
- override_values <- c(format(start.date,"%Y%m%d"),format(Sys.Date(),"%Y%m%d"))
- div <- bds(conn,paste(ticker,"Equity"), c("DVD_HIST"), override_fields,
- override_values)
- if(NROW(div)!=0){
- div <- xts(div$"Dividend Amount", as.Date(div$"Ex-Date"))
- }
- if(is.null(div) && is.null(spl)){
- divspl <- NULL
- }else if(is.null(div)){
- #need to use merge.xts, otherwise spl is cast to a numeric
- divspl <- merge.xts(NA, spl ,all=T)
- }else if(is.null(spl)){
- divspl <- merge.xts(div ,NA, NA, all=T)
- }else{
- divspl <- merge(div, spl, all=T)
- }
- if(!is.null(divspl)){
- colnames(divspl) <- c("Adj.Div","Split","Split2")
- ohlc <- merge(ohlc, divspl, all = TRUE)
- if (all(is.na(ohlc[, "Split2"]))) {
- s.ratio2 <- rep(1, NROW(ohlc))
- }else {
- s.ratio2 <- adjRatios(split = ohlc[, "Split2"])[, 1]
- }
- ohlc <- cbind(ohlc, ohlc[, "Adj.Div"] * (1/s.ratio2))
- colnames(ohlc)[NCOL(ohlc)] <- "Div"
- adj <- adjRatios(ohlc[, "Split"], ohlc[, "Div"], ohlc[, "Close"])
- s.ratio <- adj[, 1]
- d.ratio <- adj[, 2]
- cn <- colnames(ohlc)
- ohlc <- cbind(ohlc, ohlc[, "Close"])
- colnames(ohlc) <- c(cn, "Unadj.Close")
- ohlc[, "Open"] <- ohlc[, "Open"] * d.ratio * s.ratio
- ohlc[, "High"] <- ohlc[, "High"] * d.ratio * s.ratio
- ohlc[, "Low"] <- ohlc[, "Low"] * d.ratio *s.ratio
- ohlc[, "Close"] <- ohlc[, "Close"] * d.ratio * s.ratio
- ohlc[, "Volume"] <- ohlc[, "Volume"] * (1/s.ratio2)
- ohlc <- ohlc[, c("Open", "High", "Low", "Close", "Volume",
- "Unadj.Close", "Div", "Split", "Adj.Div")]
- }else{
- cn <- colnames(ohlc)
- ohlc <- cbind(ohlc, ohlc[, "Close"])
- colnames(ohlc) <- c(cn, "Unadj.Close")
- ohlc <- merge(ohlc,NA,NA,NA,all = TRUE)
- colnames(ohlc) <- c(colnames(ohlc)[1:6],"Adj.Div","Split","Div")
- }
- return( ohlc )
-}