SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : Dell Technologies Inc. -- Ignore unavailable to you. Want to Upgrade?


To: freeus who wrote (81840)11/23/1998 4:09:00 PM
From: BGR  Read Replies (1) | Respond to of 176387
 
Freeus,

Please do not be influenced by my post into making your investment decisions. I would feel real bad if I end up scaring you into taking a financially hazardous decision. That is not my goal; I am only trying to explain options from a very high level. These are not trading advices in any way.

About fair value of options:

When you sold the DELL calls, I believe you received a fair price based on the underlying equity properties at the time of the transaction. An option is always fairly valued but the underlying variables may or may not be depending upon your valuation model. Let's consider the variables at the time of sale:

Hypothetical values:

Option Strike price: 70
DELL stock price: 66
DELL historic 6-month volatility: 65
Time to expiry: 30 days
Interest rate: 4.75%
Dividend: 0%

Given these parameters Black-Scholes model will quote you a fair option value which will closely track the market value of the option. From that one can calculate

DELL implied volatility (volatility back calculated from the option price): 67 (say)

Now the question to ask is not whether the option is fairly valued given the parameters, which is most probably true. The question to ask is whether the underlying parameters are fairly valued. I generally ignore interest rates (i.e. I do not speculate on interest rate fluctuations which anyway are negligible for short term options). The time to expiry being a monotonically decreasing linear function over the life of the option is also not relevant IMO (this may not be true for LEAPS as I had earlier mentioned). The two things I watch for are volatility and stock price. If I consider DELL stock to be (under/over)valued at 66, I would not sell/buy calls, I would buy/sell calls instead. If the implied volatility is over/under the 6 month historical average, I will sell/buy calls. The last remaining variable is the strike price, in deciding which I look at the delta of that particular option and decide based on my risk preference - but I would rather not go into that right now.

In general, I follow two simple rules:

1. If the stock is (under/over)valued by my valuation model, so is the derivative.
2. If implied volatility (you can use the options calculator in the CBOE site to calculate it) is over/under 6 month historical average, the option is (over/under)valued.

Hope this helps. I understand that I rambled a bit too much in my previous post. Please ask questions if any. Would be happy to help. Gotta go!

-Apratim.



To: freeus who wrote (81840)11/23/1998 4:27:00 PM
From: TigerPaw  Read Replies (1) | Respond to of 176387
 
OT calls

The call that hurt the most friday was RMBS. I had a great scheme, got the stock, let it go up a bit, sold calls and had a 15% profit. I then had to spend the month watching the the value of the calls increase along with stock. I could have had a 30% profit if I didn't sell the calls and nearly 40% if I still had those shares today. I guess it was a cheap lesson in options. It is agrivating though, it's much easier to ignore missed opportunities when they don't appear in your balance sheet every day. Now I can go back to concentrating on todays good news (Dell, IBM, other RMBS, and CSCO).
Time to think of a new scheme.
TP