"TAP não sobrevive se se mantiver pública", garante Pinto Luz

[rsacramento]

rsacramento,

(...)
Já agora, bom livro que estás a ler

espero que sim

entretanto, mais à frente, a coisa já vem melhor explicada:

Distribution
At the potential top of a bull market, many professional traders will be looking to sell stock bought at lower
levels to take profits. Most of these traders will place large orders to sell, not at the current price available,
but at a specified price range. Any selling has to be absorbed by the market-makers, who have to create a
'market’. Some sell orders will be filled immediately, some go, figuratively, 'onto the books‘. The marketmakers
in turn have to resell, which has to be accomplished without putting the price down against their
own, or other traders’ selling. This process is known as distribution, and it will normally take some time
for the process to complete.
In the early stages of distribution, if the selling is so great that prices are forced down, the selling will stop
and the price will be supported, which gives the market-maker, and other traders, the chance to sell more
stock on the next wave up. Once the professionals have sold most of their holdings, a bear market starts,
because markets tend to fall without professional support.

[tonirai]

rsacramento,

Quando ele diz que o mercado será suportado, refere-se aos preços (cotação), e à permissa de que o mercado só é suportado enquanto houver apoio dos "profissionais" (sindicatos, etc);

Se os profissionais limitarem a oferta (reduzindo ou retirando do mercado a oferta que têm à espera nos books deles), em teoria o mercado tende a estar suportado, por haver pouca oferta;
Podem no entanto ajudar fazendo compras (até para subir o preço) - mas tal não é necessário para a manutenção dos preços.

Já agora, bom livro que estás a ler

[rsacramento]

estou um pouco embaraçado com a seguinte questão:

ao ler um texto extraído dum livro (pdf colocado aqui no caldeirão: Master the markets), às tantas o autor diz:

Urban Myths You Should Ignore
There are frequent quotes on supply and demand seen in magazines and newspapers, many of which are
unintentionally misleading. Two common ones run along these lines.
• "For every buyer there has to be a seller"
• "All that is needed to make a market is two traders willing to trade at the correct price"
These statements sound so logical and straightforward that you might read them and accept them
immediately at face value, without ever thinking about the logical implications! You are left with the
impression that the market is a very straightforward affair, like a genuine open auction at Sotheby's
perhaps. However, these are in fact very misleading statements.
Yes, you may be buying today and somebody may be willing to sell to you. However, you might be buying
only a small part of large blocks of sell orders that may have been on the market-makers' books, sitting
there, well before you arrived on the scene. These sell orders are stock waiting to be distributed at certain
price levels and not lower.

The market will be supported until these sell orders are exercised, which once sold will weaken the market,
or even turn it into a bear market.

para mim, suportar o mercado significa compra/procura em quantidade suficiente para manter os preços acima de determinado valor

ora bem: então o sindicato, enquanto não as despachar todas, anda (também) a comprar para manter o preço a um determinado nível (suporte)?