Education: SPDR ETF Holdings-or what exactly are sectors anyway?

Updated
Have you ever wondered what "key sectors" are and what exactly are in them?

Look no further!

While there are many funds to look at, these ones helped me simplify my outlook on the Market to help guide my trading decisions.

Here is the resource I use to find this info: sector spdr [.] com (Apologies, I cannot publish with a link since this is my first post and I'm new)

How to use this info?

I like to use sector information to find stocks I like. If there is a setup I like to use within one of these sectors, I will look for a top holding within the sector to play off of (since the individual stocks are more prone to move at a higher percentage than the sector as a whole).

For example, I might like the trend in XLK better than the other sectors. I will look through the stocks (which I have a watchlist for each to make things easy) in XLK to see if one has a setup I like to trade (like AAPL).

If you decide to make a watchlist for each of these sectors, I highly suggest keeping the sector itself at the top of each watchlist. Saves a lot of clicking. I also keep a watchlist titled "Key Sectors" which just has the 11 sectors in it with SPY at the top of the list. I do this to get a sense of what is happening in the Market as a whole.

Here are 11 ETF's (Exchange Traded Funds) which divide the S&P into index funds. Listed below are their top holdings (by ticker symbol) as of today:

XLC - Communication Services
FB
GOOGL
GOOG
NFLX
CHTR
CMCSA
DIS
VZ
T
TMUS

XLY - Consumer Discretionary
AMZN
TSLA
HD
MCD
NKE
LOW
SBUX
TGT
BKNG
TJX

XLP - Consumer Staples
PG
KO
PEP
WMT
COST
PM
MO
MDLZ
EL
CL

XLE - Energy
XOM
CVX
COP
MPC
SLB
PXD
EOG
KMI
WMB
PSX

XLF - Financials
BRK.B
JPM
BAC
WFC
MS
C
GS
BLK
SPGI
SCHW

XLV - Health Care
JNJ
UNH
PFE
ABT
TMO
DHR
LLY
ABBV
MRK
MDT

XLI - Industrials
HON
UNP
UPS
RTX
BA
DE
GE
MMM
LMT

XLB - Materials
LIN
SHW
APD
ECL
FCX
NEM
DOW
DD
IFF
PPG

XLRE - Real Estate
AMT
PLD
CCI
EQIX
PSA
DLR
SPG
SBAC
WELL
CBRE

XLK - Technology
AAPL
MSFT
NVDA
V
PYPL
ADBE
MA
CRM
CSCO
ACN

XLU - Utilities
NEE
DUK
SO
D
EXC
AEP
SRE
XEL
AWK
PEG
Note
simtrader19a made a great comment below about being able to compare sectors against SPY. See his example below, but it goes this this:

XLC/SPY
XLY/SPY
XLP/SPY
XLE/SPY
XLF/SPY
XLV/SPY
XLI/SPY
XLB/SPY
XLRE/SPY
XLK/SPY
XLU/SPY

His comment reminded me too... There is an indictor you all can use for this figure as well. It's called "Beta" and I'm certainly positive someone has written a script for it on TradingView. If the number is higher than 1, it indicates that particular ticker is out performing SPY (or whatever you have it set to). I tend to like stocks that are Beta 1.3 or better (for longs).
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