Stocks or options are just like inventory, and owning them is just like having your own wholesale distribution company.
Every morning you buy the best fruit you can
You try to sell it that day for the top price
If you hold the fruit overnight, it causes spoilage
As the fruit ages it loses much of its value
As a fruit vendor you know:
You want to get the best price for the fruit you bought wholesale
Some fruit is more in demand, some less
Goal- to sell all, no matter what, by day end
Experienced fruit vendors hope to make good money on 3 of every 5 pieces of fruit they own and are selling
And as the fruit vendor trades through the day he realizes:
He might get a few more pennies for the bananas
He should have bought more oranges
Kiwis arent selling well. Just because one rich lady came by and bought a little Kiwi, he knew it would be a mistake to raise his price, and risk ending the day with the a lot of decaying fruit.
Buying and selling index options is just being a fruit vendor of OEX options. When day trading especially, remember the simple beauty of this lesson.