The typical Update Wednesdays, wherein Google released new versions of its many and varied Android apps, will be a little less busy from now on. Not that Google released many updates for the Android version of Google Finance anyway - according to the Internet Archive, the last time the app was touched was way back in January of 2013. In any case, it's gone now: Finance disappeared from the Play Store without ceremony last night.
Between the lack of updates and a surprising apathy on Google's part, it's unlikely that the Android version of Finance will be missed. Reviews were hovering in the low 3's earlier this month. Aside from integration with the web version of Google Finance (which is still very much alive), it didn't offer anything that wasn't available in other stock market apps. The Android app was still rocking a pre-Holo interface, for cryin' out loud.
If you're reliant on Google Finance for some reason and need to re-install it on a new phone or tablet, we've got you covered. The "latest" version of the app is available on APKMirror. Removing the Android app may be a precursor to removing the web version of Finance - it's looking rather long in the tooth itself - or Google may re-publish the app at some point in the future.