Amazon EC2 Spot instances can now be stopped and started similar to On-Demand instances

You can now stop your Amazon EC2 Spot Instances backed by Amazon EBS and start them at will, instead of relying on the “Stop” interruption behavior to stop your Spot Instances when interrupted. Earlier, you could only terminate your Spot Instances but now you can stop your Spot Instances and start them from the user initiated stop state provided Spot capacity is available within your maximum price requirements.