Stock price when the opinion was issued
Basically the NASDAQ 100. Acts as a benchmark for a lot of people like himself. Extremely liquid. Trade, rather than invest. Top was around $550, and he thinks it will probably take out those highs before the end of the year.
Based on the look of the chart, he'd write calls against it with a strike of around $530-540. This way, you collect some premiums. If you don't want to get taken out, just keep rolling the strike price up.
QQQ-Q vs XLK-N QQQ is NASDAQ, XLK is technology. You’re going to find a lot of overlap. One thing with QQQ is BMO has the Canadian Dollar edged version, the ZQQ-T. Take a look at the website of the ETFs companies and see what weightings are and pick the one you want. Both are excellent. QQQ has some Bio stocks and a whole bunch of other stuff. For a straight technology play he would choose XLK. If you want more diversification go with QQQ.