They have been trying to boost their performance by shortening the duration (a measure that takes into account not just a bond's maturity but the interest it pays) of their portfolios.

ECONOMIST: Bond bombshell

Those familiar with over-the-counter remedies to boost athletic performance remain dubious on their effectiveness.

WSJ: Testosterone Booster Was in Pistorius's Home

Computerised fuel-injection has improved diesels' performance, and their inherent strength means they can be turbocharged to boost power even further.

ECONOMIST: Monitor

Employers are being asked to help workers boost their numeracy skills amid fears that poor maths is blighting Britain's economic performance.

BBC: Workplace maths challenge aims to boost numeracy