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efficient
The efficient-market hypothesis (EMH) is a hypothesis in financial economics that states that asset prices reflect all available information. A direct implication is that it is impossible to "beat the market" consistently on a risk-adjusted basis since market prices should only react to new information.
Because the EMH is formulated in terms of risk adjustment, it only makes testable predictions when coupled with a particular model of risk. As a result, research in financial economics since at least the 1990s has focused on market anomalies, that is, deviations from specific models of risk.The idea that financial market returns are difficult to predict goes back to Bachelier (1900), Mandelbrot (1963), and Samuelson (1965), but is closely associated with Eugene Fama, in part due to his influential 1970 review of the theoretical and empirical research (Fama 1970). The EMH provides the basic logic for modern risk-based theories of asset prices, and frameworks such as consumption-based asset pricing and intermediary asset pricing can be thought of as the combination of a model of risk with the EMH.Many decades of empirical research on return predictability has found mixed evidence. Research in the 1950s and 1960s often found a lack of predictability (e.g. Ball and Brown 1968; Fama, Fisher, Jensen, and Roll 1969), yet the 1980s-2000s saw an explosion of discovered return predictors (e.g. Rosenberg, Reid, and Lanstein 1985; Campbell and Shiller 1988; Jegadeesh and Titman 1993). Since the 2010s, studies have often found that return predictability is becoming more elusive, as predictability fails to work out-of-sample (Goyal and Welch 2008), or has been weakened by advances in trading technology and investor learning (Chordia, Subrahmanyam, and Tong 2014; McLean and Pontiff 2016; Martineau 2021).
I'm having a new boiler installed to replace my exceedingly reliable (and still working) 25-yr old Potterton Netaheat 16/22.
I've been offered this:
Glow Worm Ultracom 18HXI or Vaillant Ecotec Plus 418 (+£360)
Grundfos 15-60 high head pump
S plan, autobypass valve
Magnaclean
Power flush...
just came back from a landlord safety and the customer asked me an interesting question which i had to bluff my way through
she was adamant that she was using more gas in the summer than winter, not price but actual usage.
she had a flat mate who had been adjusting the programmer but he's now...
I'm doing up my house and wasn't sure about which heating option to choose. I thought that radiators were really inefficient but then I found this report from MARC, what do you guys think?
:
Aimed at assessing the future role of steel panel radiators in an evolving market, the report...
Lorna3
Thread
efficient
energy
heating
panel
radiator
radiators
steel
recently fitted new kitchen and took out existing rad which was under my window fed by pipework from my ceiling, i want to replace the rad with a tall rad 2m x 300mm and would like to know if its possible to connect my tails to the top of the rad rather than having pipework run down the wall to...
embo
Thread
bleed
ceiling
cold
connect
connections
efficient
fed
flow
high
hot
kitchen
pipe
pipes
pipework
question
wall
work
I have got the builders in to build me a side return extension in a four-bedroom terraced house in South London. It means remodelling the kitchen, putting in a shower room and ... sorting out the plumbing.
We have an open vent sealed system with an Ideal Classic LXFF boiler, about 8 years old, a...
bice
Thread
boiler
cold
cold water
cold water tank
combi
combi boiler
complete
condensing
copper
eco
efficiency
efficient
energy
expansion
hot
hot water
london
needing
novice
plumbing
pressurised
replacement
sealed
shower
system
tank
vaillant
vent
vessel
water
worcester
something came to my attention the other day, bio fuel machine £2,500, makes fuel to run on any deisil engine with no modification for 18p per litre + tax.
why cant we buy it at the pumps????????????.
REDSAW
Thread
efficient
litre
oil
plumbers
problem
pumps
selling
tax
waste
Hi all,
Just joined the site and am looking for some advice.
I've just bought a new house that needs completely gutting, built circa 1890, and want to fit cast iron rads. I've just agreed in principle to buy 10 from an architectural reclamation yard. Can anyone tell me how...
Conrad
Thread
bathroom
boiler
buy
cast iron
central heating system
cold radiator
combi
condensing
difficult
efficient
engineer
expansion
expansion vessel
fitting
floor
greenstar
hot rads
iron
noise
pipe
pipes
radiator
radiators
size
tank
thermostatic
thermostatic valves
valves
vessel
water
worcester
work
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