$SPDR S&P 500(SPY.US)

08/19/2026

Today's opening price was $770.360,

$SPY Put(SPY260819P771000.US) opened at $1.62,

$SPY Call(SPY260819C770000.US) opened at $1.54;

At the market open, the Longbridge Options Calculator showed Put/Call IVs of 11.00%/10.80%,

at 13:19 they were 7.40%/7.10%;

The amplitude ranged from 0.18% at 09:41 to 0.57% at 13:25;

$SPY Put(SPY260819P771000.US)

Today's opening IV was significantly lower than usual, with a PMH/PML spread of $4.970,

Wednesday's top pick $Tesla(TSLA.US) served as the intraday trading target,

The left monitor on the Intel NUC had $SPDR S&P 500(SPY.US) open for reference,

In the first ten minutes after the open, the trends for both $Tesla(TSLA.US) and $SPDR S&P 500(SPY.US) were unclear,

At 10:27, I switched the left monitor to $Tesla(TSLA.US),

At 09:31:14, all data was filled in,

$NVDA Put(NVDA260819P222500.US)

09:33 $1.45 => 09:41 $3.10, SL $1.30, LONG,

At 09:38, I noticed that $NVIDIA(NVDA.US) had a clear downward trend,

but failed to switch trading targets in time,

$NVDA Put(NVDA260819P217500.US)

10:11:01 $1.16 => 10:12:09 $1.11, SL $1.04, LONG,

At 09:47, the rebound failed to break through the EMA 20, presenting a good opportunity to enter a short position,

Also at 10:06; stop-loss set at 10:11:33, triggered at 10:13:02,

$TSLA Call(TSLA260819C340000.US)

10:23 $1.40 => 10:31 $4.00, SL $1.20, LONG,

During the upward move, the pullback stabilized at the PMH of $338.970, suggesting a gamble on going long;

At 10:27, I determined that $SPDR S&P 500(SPY.US) was not suitable for trading,

$TSLA Call(TSLA260819C345000.US)

10:31:08 $1.30 => 10:31:38 $1.22, SL $1.15, LONG,

The key issue was hesitation upon entry; around $0.85 at 10:35, without making a new low, there was no second entry,

This option reached a high of $3.85 at 10:45,

$TSLA Call(TSLA260819C347500.US)

10:39:54 $1.03 => 10:40:37 $1.21, SL $0.92, LONG,

I had to choose between $NVIDIA(NVDA.US) and $Tesla(TSLA.US),

I hesitated, entered late, and took what I could get,

The best opportunity was the 22 minutes from 10:23 to 10:45,

Stop-loss set at 10:40:06, triggered at 11:49:50,

$NVDA Call(NVDA260819C217500.US)

10:28 $1.15 => 10:40 $2.20, SL $1.00, LONG,

Here, it had already exceeded the short target price of $218.172 (= intraday high $222.870 - 5-day ATR $4.698),

Having not made a new low for over ten minutes, it should be considered an intraday bottom,

11:55 $1.50 => 12:10 $3.10, SL $1.35, LONG,

The decline touched the PML of $218.690, forming a hammer candlestick, suggesting an attempt to go long;

Summary:

1️⃣ Enter after identifying the trend, rather than opening positions randomly when the market is difficult to trade;

2️⃣ Longbridge Pro v2.38.12 updated the view effects, and I'm still getting used to them;

3️⃣ Several missed opportunities today were due to incorrect monitoring targets;

4️⃣ Pay attention to targets approaching the PMH/PML, as entry opportunities will arise.