Alongside these sorts of industry changers, there is also a persistent trend of making things more user-friendly and convenient.

But if these persistent trends in inflation remain, if prices are rising when some expect them to fall, it means that interest rates may have to rise.

"That is something that could end up being a more persistent trend."

A persistent trend in one direction will result in a loss for the market maker, but the strategy is overall positive (otherwise they would exit the business).

"Their persistent southeasterly trend suggests deposition of the loess by prevailing northwesterly winds, possibly anticyclonic winds blowing from the retreating ice sheet."

In some ways, the agreement between Societe Generale and Paribas reinforces a persistent trend toward ever-bigger banking combinations between institutions in the same country.

Whether this will be a persistent trend is hard to know.

Jitō continued to hold power as a cloistered ruler, which became a persistent trend in Japanese politics.

One of this year's most persistent trends (other than the business part of the music business melting like a Snickers in your back pocket) is the rebirth of house music.

A persistent trend for 2012 will be the continued growth of smart mobile devices.