See: Leg Out.
You put your good leg in...you put your bad leg out. And you do the hokey pokey as you turn yourself about.
Something like that, anyway. It was Adele or maybe Gaga who sang it.
Anyway, "legging in" refers to the process of buying a meaningful position, usually in stocks, as performed by large institutional buyers who have to worry about trading liquidity in the security they want to buy.
Like...Fidelity might decide that MSFT has finally gotten its act together, and wants to own 100 million shares. If they try to buy more than 10 million on any given day, they'll push upward the price of the stock, making the cost of gaining that position more expensive. That would be bad.
So they leg in, buying 5 million shares one day, then nothing the next, then 3 million the next. Then they stop. The brokers front-running them (i.e. buying shares ahead of them, marking up the price and then re-selling to them) might then not be "tipped off" to the notion that Fido wants 100 million shares. They then might leg in another 10 or 15 or 20 million shares on a weak market day when those shares are easier to buy. In the process of this hokey pokey, over a few weeks or so, they'll have "quietly" snarfed up the 100 million shares that they wanted for a full position in the stock, and then pray that it goes up. Or whatever they do to make gains in stocks at Fido. Woof.
Related or Semi-related Video
Finance: What is Front Running?3 Views
Finance allah shmoop what is front running All right you're
a b s d a big stock diviner your job
is to invest for the mega gargantuan billions of dollars
in assets mutual fund that you manage your kindly loving
trusted and for friendly broker at nah graham nad log
c and bp group knows that you've been a hankering
for a big position in mega soft which has traded
down tto only fourteen times earnings well the bank has
set up meetings for you with senior management it's given
you reams of its own research on personal computer sales
declines and all kinds of dope on how mega soft
is doing so they know you're interested Then comes along
and ugly day in the overall market and mega soft
drops from twenty three bucks a shared a twenty two
along with everything else that's down big for five percent
You think now it's my time toe act a different
kind of acting meaning now it's my time to buy
twenty five million shares and yes that's a lot of
shares but you do that all the time in your
mega fund and twenty five million shares at twenty two
Bucks is now scootch over five hundred million dollars Since
your fund is twenty five billion in assets and while
that's only a two percent position for you So how
is your broker thinking about this Well she could sell
you those shares all of them and get a two
cent a share commission for the pleasure If she sold
you all twenty five million shares well that would be
half a million bucks in commission for one trade Yeah
nice work if you can get it But she has
her eye on the executive suite of nah Graham nad
lob c n b p group and really wants the
private bathroom with the waterfall rumored to be on the
fifty second floor So she thinks if i whisper to
my trusted trader tt that megha is buying twenty five
million shares while tt could go in front of mega
sze buying i front run him buy up everything at
twenty two dollars and then deal off the top of
his deck or sell two mega the shares he bought
it's a you know a twenty cent a share profit
like he buys it Twenty two even sells them at
Twenty two twenty on their way to twenty three and
higher The mega fund manager would even notice that twenty
cent difference Probably not Not if the bank does that
quickly and quietly and maybe brings in its foreign partners
to do so Well if they did this if they
front ran the mega mutual fund and bought shares ahead
of it on their own proprietary account well they'd make
twenty cents a share buying him in the morning and
selling in the afternoon That's twenty cents times twenty five
million shares now that's five million in gains tow her
firm Not just that measly two Sent to share commission
five hundred grand She'd keep like twenty percent of the
total here So um is it worth it Is it
worth it The five million twenty million dollars Well she
ponders and ponders and then decides it wasn't because front
running is patently illegal and her firm forbids it at
least notionally where they can control the behavior So her
career's over and she goes to jail Yeah moral don't
do this Hey at least she has a long string
to chat with tt on the men's side of the
prison too So you really don't want to do front 00:03:36.935 --> [endTime] running
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