My normal markets are the SPX, crude and silver and the DX. But I watch Gold and the long bond. So Monday I see something that makes me want to get short Gold. I`m watching the option chain...not much volume but size represented up and down the box. 3 point spread...no big deal, I often pay up/down the spread to get in or out. All looks good for a purchase. I buy 1 little GC 750 put for Nov20 exp @ 23.5 the offer. it was bid 21.9...underlying was trading at 845..yay first time trading gold in 7 years of action! I come in on tuesday and the underlying is at 833 and the put is down almost 5.5 on the offer with a 10 buck spread. I`m like WTF!? Boo....why did I trade gold?! Did implied volty drop overnight and crush prem....did I get raped by some arb guy? I`m not looking to blame game. I bot em I own em...but I need to avoid this type of mistake in the future. If somebody can give me some insight I would greatly appreciate it.