Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of heavy construction products supplier Texas Industries (UNKNOWN:TXI.DL) cemented big gains of as much as 12% following an upgrade from research firm Sidoti.

So what: In a report released earlier today, Sidoti upgraded Texas Industries to "buy" from "neutral." The upgrade follows TXI's first-quarter earnings release from three weeks ago that saw the company miss Wall Street's earnings estimates by reporting a wider-than-expected loss, despite noting that shipments are improving, pricing is stabilizing, and margins are showing signs of correcting in the right direction.

Now what: As usual, it's rarely worth paying much credence to the one-day pops and drops that are caused by analyst upgrades and downgrades as they don't often play into the long-term scheme of an investment. On a secondary note, I've never even heard of Sidoti despite my 14 years of investing, so I'm even less inclined to chase this one-day rally higher. Until TXI can cement its shareholders a bottom line profit, I'd just assume leave it on the sidelines.

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