portfolio rebalancing - Помогите пожалуйста перевести в контексте gen.

[Dеmitry]

QE proper is a third type. The most straightforward way this is meant to help the economy is through “portfolio rebalancing”.

[A.Rezvov]

К сожалению, похоже на то, что приведенный фрагмент текста недостаточен для того, чтобы ответить на Ваш вопрос... Дайте больше текста. Или объясните, о чем говорится чуть раньше и чуть позже.

[Dеmitry]

1. QE has now come to refer to several flavours of asset-purchase programme. One version is often called “credit easing”. The aim is to support the economy by boosting liquidity and reducing interest rates when credit channels are clogged. The Fed’s purchases of mortgage-backed securities, demand for which weakened sharply during the financial crisis, fall into this category.
Another type of asset purchase aims to boost the economy without creating new money. The Fed’s ongoing “Operation Twist” is an example: the Fed sells short-term debt and uses the proceeds to buy long-term debt. Giving investors cash for long-term debt should prompt them to invest more money in other assets.
QE proper is a third type. The most straightforward way this is meant to help the economy is through “portfolio rebalancing”. The investors who sell securities to the central bank then take the proceeds and buy other assets, raising their prices. Lower bond yields encourage borrowing; higher equity prices raise consumption; both help investment and boost demand. To the extent that investors add foreign assets, portfolio rebalancing also weakens the domestic currency, fuelling exports.

Я перевел это так - изменение качественного состава ценных бумаг в инвестиционном портфкле
portfolio rebalancing – the tendency of professional portfolio managers to put money at risk at the beginning of the year and move out of risky stocks and into safer investments towards the end of the year in an effort to outperform benchmarks and secure a Christmas bonus. It is related to window dressing and the so called “January effect” and the “sell in May and go away” axiom.
Example
Professional portfolio managers’ efforts to maximize their own benefits/remuneration lead them to rebalance portfolios and window dress in predictable ways throughout the year.
The high returns on risky securities around the turn of the year are caused by systematic shifts in the portfolio holdings of professional portfolio managers who rebalance their portfolios to affect performance-based remuneration.
Institutional investors are net buyers of risky securities around the turn of the year when they are motivated to include less well known, high risk securities in their portfolios to try to outperform their benchmarks.
Later in the year, portfolio managers (as they rebalance their portfolios) lock in returns by divesting from lesser-known risky stocks and replacing them with well known safer stocks or risk-free securities, such as government bonds. At the same time, they also switch to stocks or securities they perceive to be less risky and more glamorous in order to spruce up their portfolios (i.e., window dress). The excess demand for risky stocks at the beginning of the year bids the prices of these securities up. As the year draws to a close, the supply of relatively higher-risk stocks grows and the prices decline.
http://lexicon.ft.com/Term?term=portfolio-rebalancing

[trtrtr]

Я бы написал ребалансировка инвестиционного портфеля, а объяснение и так есть в тексте.