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I’ve heard many option traders say they would
never do something:
"…never buy really out-of-the-money options!", "…never sell in-the-money
options!" But it’s funny how these absolutes seem silly – until you find
yourself in a trade that’s moved against you.
Believe me, I’ve been there. Facing this scenario, you’re often tempted to
break all kinds of personal rules, simply to keep on trading the same
option you started with. Wouldn’t it be nicer if the entire market was
wrong, not me?
As a stock trader, you’ve probably heard a similar justification for
"doubling up to catch up": if you liked the stock at 80 when you bought
it, you’ve got to love it at 50 – so buy more and lower the net cost basis
on the trade.
Be wary, though: what makes sense for stocks might not fly in the options
world.
How can you trade smarter?
"Doubling up" as an options strategy usually just
doesn’t make sense. Options are derivatives, which means their prices
don’t move the same or even have the same properties as the underlying
stock. Time decay, whether good or bad for the position, always needs to
be factored in.
When things change in your trade and you’re contemplating
the previously unthinkable, just step back and ask yourself: "Is this a
move I’d have taken when I first opened this position?" If the answer is
no - don’t do it. Close the trade, cut your losses, or find a different
opportunity that makes sense now.
Options offer great possibilities for leverage on
relatively low capital – but they can blow up just as quickly as any
position if you dig yourself deeper. Take a small loss when it offers you
a chance of avoiding a catastrophe later.
Simply put, liquidity is all about how
quickly a trader can buy or sell something without causing a significant
price movement. A liquid market is one with ready, active buyers and
sellers at all times.
Here’s another, more mathematically elegant way to
think about liquidity: it refers to the probability that the next trade is
executed at a price equal to the last one.
Stock markets are generally more liquid than their related options markets
for a simple reason: stock traders are all trading just one stock, but the
option traders may have dozens of option contracts to choose from. Stock
traders will flock to just one form of IBM stock, but options traders for
IBM will have, perhaps, six different expirations and a plethora of strike
prices to choose from. More choices by definition means the options market
will probably not be as liquid as the stock.
Of course, IBM is not usually a liquidity problem
for stock or options traders. The problem creeps in with smaller stocks –
take SuperFutureBank, an (imaginary) financial institution with huge
promise, a stock that trades once a week by appointment only.
If the stock is this illiquid, the options on
SuperFutureBank will likely be even more inactive, likely causing the
bid/ask spread to get artificially wide. If the spread is $0.20; on a
$2.00 contract this is a full 10% of your price.
Bottom line: trading illiquid options drives up the
cost of doing business even higher – and options trading costs are already
higher, on a percentage basis, than for stocks. Don’t burden yourself.
Here’s a popular rule-of-thumb: If you are trading
options make sure the open interest is at least equal to 30 times the
number of contacts you want to trade. For example, to trade a 10-lot your
acceptable liquidity should be 10 x 30, or an open interest of at least
300 contracts.
("Open interest" is the number of outstanding option contracts of a
particular strike price and expiration date that have been bought or sold
to open a position. Any opening transactions increase open interest, while
closing transactions decrease it. Open interest is calculated at the end
of each business day.)
Trade liquid options and save yourself added cost and stress. There are
plenty of liquid opportunities out there.
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