$SPDR S&P 500(SPY.US)

Today's opening price was $657.170,

The options ready to be opened are $SPY 251014 658 Put(SPY251014P658000.US)

and $SPY 251014 657 Call(SPY251014C657000.US);

$SPY 251014 658 Put(SPY251014P658000.US) opened at $2.76,

$SPY 251014 657 Call(SPY251014C657000.US) opened at $2.54;

At market open, Longbridge's options calculator showed Put/Call IV at 21.60%/22.30%,

which wore down to 18.00%/19.90% around 12:09 pm;

Volatility ranged from 0.45% at 09:40 am to 1.49% at 12:09 pm;

$SPY 251014 658 Put(SPY251014P658000.US)

The high IV at open made me hesitant to trade options,

$SPY 251014 657 Call(SPY251014C657000.US)

Missed the news about SPX000 Call purchase at 09:47 am,

09:51 am $1.30 => 10:29 am $3.80,

$NVDA 251017 185 Call(NVDA251017C185000.US)

$TSLA 251017 450 Call(TSLA251017C450000.US)

$HOOD 251017 143 Call(HOOD251017C143000.US)

Today's theoretical profit for 3DTE is far less than 0DTE, at $0.30/contract, $0.60/contract, and $0.50/contract respectively,

$Walmart(WMT.US)

There was positive pre-market news, but I didn't go long due to the market drop at open,

$Pro Ultr Cvix Shrt Futures(UVXY.US)

09:35:08 am $12.27 => 09:39:04 am $12.38,

09:36.54 am $12.37 => 09:39:04 am $12.38,

$Palantir Tech(PLTR.US)

10:17:52 am $175.401 => 10:23:30 am $178.000,

In summary, IV represents the market participants' collective expectation of the underlying's future volatility.