Things I've learned trading for the past 4 years in no particular order while reflecting this Sunday on it all:

THREAD ON DELTA (The most important GREEK)

Many traders don't indulge in understanding GREEKS because they think they are very complicated.

There are 4 primary greeks:

Delta
Gamma
Theta
Vega

In my experience, understanding DELTA is enough to take benefit of greeks.(1/n)

Delta measures the rate of change of options price based on the directional movement of the underlying.

So this means we can know in advance (theoretically) how much an option will move with the underlying & so we can prepare our strategies accordingly. (2/n)

Value of delta varies between 0 & 1 for calls and -1 & 0 for puts. This figure tells how much an option price will change, when the underlying moves 1 point. So example a delta of .2 of call indicates that for every 1 point change in the underlying, the price will move .2 (3/n)

For option writers who want to trade in neutral strategies like straddle, strangle, ratios, calendar etc, delta can be very helpful. So be it any complex strategy, knowing the NET DELTA can give you an idea of how your strategy will perform in different scenarios. (4/n)

Net delta is just the sum of the deltas of all the bull options (call+ & put-) minus the bear options (call- & put+).

So if we can track this, we will always be in the know of how much exposed our position is. It makes it easier then to adjust our position. (5/n)

In my 20 years of trading I have noticed this cycle play out again and again with traders that "make it":

1. Overconfidently reach for returns
2. Get humbled by the market
3. Simplify + concentrate on clear, high probability edges.

1/n

Nearly everyone starts with a lack of respect for how hard it is to consistently make money trading.

That leads them to pass over high-probability sources of returns in favor of more marginal ideas.

Or they overcomplicate the trading of a good edge.

2/n

Here's an example...

It is 2015. You look at a simple strategy.

You hold an equal dollar exposure to:
- Cap Weighted US Stocks (VTI)
- 20+ Yr US Treasury Bonds (TLT)
- Gold (GLD)

And rebalance each month.

(I've extended back a bit with mutual fund prices.)

3/n

It made money consistently with a few blips.

You'd have 4x your money from 1997 to 2015.

It makes sense. It's harnessing two big sources of risk premia (equity + duration).

It diversifies across 3 macro assets that tend to outperform in different econ environments

4/n

But, naturally, you turn your mind to how you could do better...

And here is where it gets dangerous!

There are good ways to try to "do better", and there are bad ways to try to "do better".

5/n

1/ How to review quarterly earnings 🧵

A step by step guide using $DXCM as an example

⬇️

2/ The BIG question: Is the thesis on track❓

Other question:

❓Is revenue growing?
❓Are margins stable/expanding?
❓Profits?
❓Balance sheet?
❓New opportunities?
❓New threats?

3/ I open 4 browser tabs

Tab 1 - Current company earnings report / shareholder letter

Tab 2 - Previous company earnings report / shareholder letter (check guidance)

Tab 3 - Analyst estimates

Tab 4 - Call Transcript

4/ Tabs 1 & 2 - Find the current & previous earnings report

I search "Dexcom Investor Relations"

I click on "press release"

Open the newest quarterly earnings report and last quarter

It can also be a shareholder letter/presentation

5/ Tab 3 - Find the quarterly analyst estimates

Open up $DXCM in yahoo finance

The "news" section usually has a link to reports on whether the company beat/met estimates

The "analysis" tab is a good source, but sometimes it updates to the next quarter too quickly

Many traders have no consistency when sizing their positions.

The pros have this down to a science.

Here's my dead simple, 3-step guide to position sizing (and to outperforming 99% of other traders in the process):

Step 1:

Define how much of your account you're willing to risk per trade.

Personally, I never risk more than 1% of my account equity.

If I have $100,000 account, I will never risk more $1,000.

This ensures I will never blow up my account on one single trade.

There are successful traders who risk 2-3% of their account per trade, but I find it most calming to risk 1% or less.

The first step in this process is completely up to you - only you can dictate how much risk you can tolerate.

Step 2:

Look for entries & exits that are within 5% (preferably less) of each other.

This means if I buy a stock & have a 5% stop loss, I can put a 20% equity position on & still be risking 1% of my equity.

Your account will thank you w/ 20% in a stock that goes up 100%.

Step 3:

Position size using this formula:

Total equity (100%) / Trade Stop Loss %

So, if your stop loss is 4%, here's the math:

100% equity / 4% stop loss = 25% Equity Position Size

(assuming 1% equity risk).

Here's another hypothetical calculation:

1/ I used to think that the biggest gains had to come from stocks that no one knew about

One of the harder lessons for me to internalize has been that oftentimes, unknown stocks stay unknown for a reason and you can still earn attractive returns from stocks everyone's bullish on

2/ While I’m not contrarian just for the sake of being contrarian, I do think it’s important to question everything.

When I started out, I would buy "quality" stocks like FB or TSLA without doing much research.

But an opinion being consensus doesn’t make it the truth.

3/ So owning the most popular stocks made me nervous. If a winner is so obvious then either it's priced in or maybe I'm missing something?

I preferred owning stocks that others weren’t aware of or were bearish on for the wrong reasons (more room for upside surprises).

4/ But there are degrees

Despite being widely popular, stocks like SHOP have been some of the best performers because they exceeded even the most bullish projections

And some stocks like TSLA are partly popular because they are great consumer products which is an important sign

5/ On the other hand, while the biggest winners can be found in micro-caps, many of which started out very undervalued with no analyst coverage, on average, they tend to underperform larger caps

Picking out the big winners earlier on is very difficult and there is no set formula