Go long

When you go long, you buy a security or other financial product that you intend to hold for a period of time or one that you expect to increase in value so that you can sell it at a profit.

Going long is the opposite of going short, which means you sell an investment, usually because you expect it to decline in value in the near future.

If you're buying and selling options or futures contracts, you go long when you enter a contract to buy and you go short when you enter a contract to sell.